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东濮凹陷低渗砂岩油藏水淹层测井解释方法

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东濮凹陷低渗砂岩油藏水淹层测井解释方法  [收稿日期 ] 2007212206   [作者简介 ] 陈彬 (19632) , 男 , 1985 年江汉石油学院毕业 , 高级工程师 , 现主要从事油田开发地质和测井解释方面的研究工作。 东濮凹陷低渗砂岩油藏水淹层测井解释方法   陈  彬  (中原油田分公司勘探开发科学研究院 , 河南 濮阳 457001)   巢思友  (中原石油勘探局地球物理测井公司 , 河南 濮阳 457001)   刘志远  (中原油田分公司勘探开发科学研究院 , 河南 濮阳 457001)   王向公  (长江大学地球物理与石油...

东濮凹陷低渗砂岩油藏水淹层测井解释方法
  [收稿日期 ] 2007212206   [作者简介 ] 陈彬 (19632) , 男 , 1985 年江汉石油学院毕业 , 高级工程师 , 现主要从事油田开发地质和测井解释方面的研究工作。 东濮凹陷低渗砂岩油藏水淹层测井解释方法   陈  彬  (中原油田分公司勘探开发科学研究院 , 河南 濮阳 457001)   巢思友  (中原石油勘探局地球物理测井公司 , 河南 濮阳 457001)   刘志远  (中原油田分公司勘探开发科学研究院 , 河南 濮阳 457001)   王向公  (长江大学地球物理与石油资源学院 , 湖北 荆洲 434023) [摘要 ] 在分析了低渗油藏水淹层特征的基础上 , 针对低渗储层自然电位曲线幅度平缓、混合液电阻率求 取困难的问题 , 用电阻率相对值法 , 建立一套以电阻率相对值法为基础的剩余油饱和度解释方法 , 避开 了混合液电阻率的求取过程。基于可动水分析法 , 通过聚类分析 , 建立了利用含水饱和度和束缚水饱和 度分级判别水淹层的交会图版 , 消除了岩性、物性对水淹层解释的影响。实际资料的处理解释和应用 , 提高了水淹层的解释符合率 , 见到了良好的地质应用效果。 [关键词 ] 低渗油藏 ; 水淹层 ; 测井 ; 解释方法 [中图分类号 ] P631184 [文献标识码 ] A    [文章编号 ] 100029752 (2008) 0220091204 经过 20 多年的注水开发 , 东濮凹陷的几个主要油田都已进入特高含水开发期 , 随着中高渗油藏含 水率的不断上升 , 开发的潜力已由中高渗油藏向低渗油藏转移。由于低渗油藏储层物性差 , 孔隙结构复 杂 , 储层的束缚水饱和度明显偏高 , 孔隙空间的流体信息所占测量信息的比例减小 ; 地层水矿化度高 , 钻井液又因受盐岩的影响也为高矿化度 , 识别水淹层的测井曲线特征变化不明显 , 导致水淹层的解释难 度大。东濮凹陷低渗油藏水淹层解释的难点主要表现在如下几个方面 : ①低渗油藏水淹层的电阻率变化 不明显 ; ②自然电位幅度普遍变化平缓 , 难以有效估算水淹层的水性变化 ; ③可动流体空间明显变小 , 要求提供更为精确的储层参数解释模型 ; ④岩性、物性的变化影响水淹层的有效识别 ; ⑤缺乏人工裂缝 对水淹层解释影响的认识。笔者针对上述问题 , 用电阻率相对值法 , 建立了一套以电阻率相对值法为基 础的水淹层解释方法。 1  低渗储层水淹层特征分析 利用常规测井资料并结合岩石物理实验资料 , 分析低渗油藏水淹层的显示特征 , 建立储层精细解释 模型 , 研究不同地区或区块的变化规律是正确评价低渗油藏水淹层的基础。 111  低渗储层孔隙特征  表 1  WC油田沙四段、WD 油田沙三中亚段储层物性参数统计 物性参数 WC 油田 孔隙度 / % 渗透率 / 10 - 3μm2 WD 油田 孔隙度 / % 渗透率 / 10 - 3μm2 主要范围 13~19 1~40 15~20 12~47 平均值 151 4 91 4 181 0 301 0研究区物性分析 (表 1) 、压汞、相渗等实验结果表明 , 低渗透油藏储层物性差 , 岩石孔隙结构复杂 , 束缚水饱和度、残余油饱和度偏高 , 造成可动流体空间变小 , 这就要求低渗储层水淹层解释参数模型应有足够的精度。 112  水淹层测井显示特征 在油田注水开发过程中 , 随着注水量的不断增加 , 水对岩石不断产生冲洗作用 , 使岩石的物理、化 学性质发生变化[ 1~5 ] , 这些变化在测井资料上一般有所反映 , 主要体现在以几方面 : ①电阻率的下降或 ·19· 石油天然气学报 (江汉石油学院学报)  2008 年 4 月 第 30 卷 第 2 期 Journal of Oil and Gas Technology (J1J PI)  Apr12008  Vol1 30  No1 2 抬升。在污水回注的条件下 , 水淹层的电阻率多表现为电阻率下降的特征 , 但下降的幅度与水淹程度、 物性、注入水水性等多种因素有关。也有少数强水淹层的电阻率出现数值回升趋势。②自然电位的异常 变化。油层水淹后 , 在自然电位曲线上主要表现为自然电位基线发生偏移、幅度反向变化、幅度增大或 曲线的不规则变化 , 它们是定性判别水淹层的重要依据。③压力系数降低。在油田的开发过程中 , 由于 砂体岩性的变化、封闭断层的存在、注采井网的不完善等各种因素的共同制约 , 使得纵向上各层的压力 系统有差异。水淹层的压力系数一般低于甚至明显低于原始油层的压力系数。④电阻率和孔隙度曲线对 应性差。在油层处 , 孔隙度大的部位电阻率一般最高 , 电阻率与孔隙度曲线具有很好的对应性 , 但油层 水淹后 , 孔隙度大的部位与最高电阻率常出现深度不对应的现象。⑤自然伽马畸变。由于大量注入水的 影响 , 溶于水中的微量放射性物质沉淀在某些储层上 , 使得该储层的自然伽马明显增高 , 呈现与其他曲 线不对应的特征。 113  人工压裂缝的分布及对注水的影响 低渗油井投产或水井投注时 , 一般要进行人工压裂[6 ] , 压裂产生的人工裂缝将对附近注水井的注入 水推进产生影响。根据 WD 油田沙三中亚段地层 16 口井的人工裂缝微地震监测资料统计 , 有 13 口井的 人工裂缝沿北东2南西方向展布 , 占 8113 %。在其中的 3 口转向压裂井中 , 人工裂缝方位前、后变化为 911~1317°, 转向后的方位仍为北东2南西方向。 通过该油田 6 口注水井 10 个层段的水驱前缘监测结果统计 , 有 8 个层的优势注水方向在北东2南西 方向上 , 占监测层的 8010 % , 这说明注入水优先沿人工裂缝的方向扩散。因此 , 在水淹层的解释中 , 除应考虑注入剖面测井外 , 还应充分考虑人工裂缝对水驱推进的影响 , 在水驱推进优势方向上 , 容易形 成注入水的突进 , 造成油层的强淹 ; 而在与优势注水方向垂直的方向上 , 虽然离注水井近 , 但水淹程度 可能弱甚至为油层。 2  低渗储层水淹层解释方法 211  储层参数解释模型 在测井资料 标准 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 化的基础上 , 利用岩性、物性分析资料与测井资料的关系 , 可分别建立泥质含量、 孔隙度、渗透率解释模型 , 进而建立饱和度解释模型。 1) 原始含油饱和度  在纯油层中 , 储层的孔隙空间被原油和束缚水充填 , 所以一般的方法是通过 先确定束缚水饱和度 , 然后再求取原始含油饱和度。根据密闭取心或压汞、相渗资料 , 研究饱和度与孔 隙度、渗透率的相关性 , 建立束缚水饱和度与孔隙度、渗透率的关系式。WC 油田沙四段低渗储层束缚 水饱和度的解释模型为 :   lg ( Swi ) = 118712 - 0101889< - 0100011 K (1) 式中 , Swi 为束缚水饱和度 , %; <为储层孔隙度 , %; K 为储层渗透率 ,10 - 3μm2 。 2) 剩余油饱和度  水淹层的剩余油饱和度是确定和评价储层水淹后含油状况最直接的参数。由于 注入水的进入 , 储层的电阻率 Rt 发生了变化 ,但是该变化有绝对性 ,又有相对性 ,电阻率的变化是相对注 水前而言 ,其数值大小和水淹程度有着密切的联系 ,且能反映储层性质的相对变化。 对污水水淹来说 ,选取同一地区、同一层位标准油层完全水淹时的电阻率 Ro ,则电阻率相对值 Rt′为 :   Rt′= ( Rt - Ro ) / Ro (2) 根据岩样测试资料 ,结合测井资料、投产情况及对淡水水淹情况的分析 ,建立了淡水水淹情况下的电 阻率相对值公式 :   Rt′= ︱2 Rtt′- ( Rt - Ro ) / Ro ︱ (3) 式中 , Rtt′为研究区块淡水水淹电阻率相对值的门槛值 ,一般由实验确定。 根据岩样水驱油岩电实验结果 , 利用电阻率相对值 , 在分析试油、压汞、相渗等资料的基础上 , 可 分区建立水淹层测井解释参数模型。 由于东濮凹陷的油区目前一般多为污水水淹 , 因此可利用能较好反映油层和水淹层的电阻率相对值 Rt′及含水饱和度 S w 建立解释图版 , 同时含水饱和度又与孔隙度有关 , 建立模型时综合考虑电阻率和孔 ·29·   石油天然气学报 (江汉石油学院学报) 2008 年 4 月   图 1  WC油田低渗储层含水饱和度关系图版 隙度的因素。图 1 为 WC 油田低渗储层电阻率相对 值、孔隙度与含水饱和度关系图版 , 通过拟合可得 到不同孔隙度下的含水饱和度公式。 212  低渗油藏水淹层判别图版 储层由于受岩性、物性的影响 , 其原始含油饱 和度或束缚水饱和度是不同的 , 岩性、物性不同的 2 个水淹层 , 尽管有相等的含油 (或水) 饱和度 , 但它们的水淹程度显然是有差别的。由此 , 研究了 用含水饱和度与束缚水饱和度交会的方法来判别水 淹层。 根据研究的储层参数解释模型及不同区块试油 和投产井的生产情况分析 , 利用测井资料分别计算 出各层的孔隙度、渗透率、含水饱和度和束缚水饱 和度 , 在此基础上分区或层位分别建立储层识别图 版和水淹层识别图版。图 2 和图 3 分别给出了 WC 油田沙四段和 WD 油田沙三中亚段的储层及水淹层识别图版 , 从图版中可以看出 , 不同级别水淹层对 应的含水饱和度差别小 , 岩性、物性差的层或束缚水饱和度偏高的层 , 这种差别将趋于更小。相同的含 水饱和度可能对应不同级别的水淹层 , 这是由于岩性差异造成储层具有不同的束缚水饱和度 , 通过二者 的交会 , 可以提高水淹层的判别能力。 图 2  WC油田沙四段识别图版 3  应用效果分析 利用上述研究方法 , 对 WC 油田沙四段、WD 油田沙三中亚段和 WN 油田沙三上亚段低渗透油藏 的新井水淹层进行了解释。据 WC 沙四段和 WD 沙三中亚段 28 口井的资料统计 , 扣除干层后 , 总解释 层数为 144 层 , 符合 118 层 , 总符合率为 8119 %。 X2226 井是部署在 WD 油田 W13 块的一口开发井 , 根据处理结果 (图 4) 和判别标准 , 图 4 中的 62 号层解释为油层 , 65 号层和 68 号层上部解释为 3 级水淹层 , 68 号层下部解释为 2 级水淹层 , 64 号 层物性偏差解释为低产油层 , 其他层岩性、物性较差解释为干层。射开 334813~337514m 井段 917m/ 7 层投产 , 日产液 2115t , 油 615t , 气 150m3 , 综合含水 6918 % , 投产结果为 2 级水淹层 , 解释结论与投 产结果符合。 ·39·第 30 卷第 2 期 陈彬等 : 东濮凹陷低渗砂岩油藏水淹层测井解释方法   图 3  WD 油田沙三中亚段识别图版 图 4  X2226 井水淹层解释成果图 [参考文献 ] [ 1 ] 赵培华1 油田开发水淹层测井技术 [ M ] 1 北京 : 石油工业出版社 , 20031 [ 2 ] 潘敏1 水淹层特征识别 [J ] 1 西部探矿工程 , 2006 , 18 ( 5) : 74~751 [ 3 ] 刘红歧 , 陈平 , 夏宏泉 等1 新立低渗透油田水淹层特征及识别方法研究 [J ] 1 西南石油大学学报 , 2007 , 29 (2) : 65~671 [ 4 ] 许君玉 , 赵国欣 , 武玉宏1 胜坨油田坨七断块水淹层测井解释技术研究 [J ] 1 断块油气田 , 2006 , 13 (6) : 86~881 [ 5 ] 李桢 , 骆淼 , 杨曦 等1 水淹层测井解释方法综述 [J ] 1 工程地球物理学报 , 2006 , 3 ( 4) : 288~2941 [ 6 ] 王鸿勋 , 张琪1 采油工艺原理 [ M ] 1 北京 : 石油工业出版社 , 19941 [编辑 ]  弘  文 ·49·   石油天然气学报 (江汉石油学院学报) 2008 年 4 月 t her differentiate following t he more intensive matching of t he two blocks corresponding to Anxian movement , which result s in t he f rame2 work of“two bulges and t hree depressions”and SQ2 is developed more widely1 The filling processes of t he depressions in t he whole area demonst rate t hat Qinling2Dabie orogenic belt is t he model of synchronal arcuate collisional orogeny1 Key words : middle Yangtze area ; late Triassic ; sequence division ; tectonic2evolutional pat tern ; sequence st ratigraphy 73 Electric Magnetization Inside Metall ic Casing and Measurement in Laboratory WANG J un2min  ( College of Geophysics and Geomatics , China Universit y of Geosciences , W uhan 430074 , H ubei , China; Key L abo2 ratory of Ex plorat ion Technologies f or Oil and Gas Resources  ( Yangtze Universit y ) , Minist ry of Education , J ingz hou 434023 , H ubei , China) HU Wen2bao , XU Zhen2ping  ( Key L aboratory of Ex ploration Technologies f or Oil and Gas Resources  ( Yangtze Universit y ) , Minist ry of Education , J ingz hou 434023 , H ubei , China) Abstract : The difficulty for implementing resistivity measurement in formation by using t hrough2metallic casing was to break t hrough t he casing shield1 To prove t he possibility of low frequency elect romagnetic field penet rating t hrough t he casing , t heoretical calculation of t he magnetic response inside t he metallic casing and laboratory measurement were carried out1 Because t he elect romagnetic signals in t he cas2 ing were very weak , a powerful and special elect romagnetic emission unit was designed and a highly sensitive probe and high precision de2 tecting tool were developed , t he elect romagnetic signal excitation and measurement inside t he metallic casing were implemented1 The re2 sult s show t hat it is feasible to excitate t he low frequency signal and measure t he weak signals inside metallic casing , t he information of resistivity in formation can be obtained based on t he signals inside t he casing1 Key words : t hrough2casing resistivity measurement ; powerful emission source ; weak signal measurement ; magnetic response ; magnetic excitation 77 3D Numerical Simulation of Dual2phase Porous Media Based on BISQ Mechanism LI Hong2xing  ( Col lege of N uclear Technology , H uadong Universit y of Technology , Fuz hou 344000 , J iang x i , China; College of Geo2ex ploration Science and Technology , J i lin Universi t y , Changchun 130026 , J i lin , China; N o12 I nstit ute of Oceanography , H ang2 z hou 310012 , Zhej iang , China) LIU Cai  ( College of N uclear Technology , H uadong Universi t y of Technology , Fuz hou 344000 , J iang x i , China; College of Geo2 ex plorat ion Science and Technology , J i lin Universi t y , Changchun 130026 , J i l in , China) WU Zhi2chang  ( Geophysics Ex pl ration Com pany , Daqing Pet roleum A dminist ration B ureau , Daqing 163357 , Hei long j iang , Chi2 na) TAO Chun2hui  ( N o12 I nstit ute of Oceanography , Hangz hou 310012 , Zhej iang , China) Abstract : Most of t he wave2field numerical simulation techniques were 2D numerical simulation , t he dist ributive properties were difficult to be reflected in 3D space by using 2D numerical simulation1 Based on t he constitutive equation and motion equation of elastic wave in BISQ model , a high2order finite differential algorit hm for 3D spatial staggered grid of an elastic wave in dual2phase porous media was de2 rived and a 3D numerical simulation was carried out , t hus a 3D scheme was established1 The result shows t hat t he 3D numerical simula2 tion can be used f rom different views to observe t he fast image of wave fields in different planes , to better reflect wave field space and wave propagation property1 Key words : porous medium ; BISQ ; 3D spatial staggered grid ; high2order finite differential ; 3D numerical simulation 81 Application of Waveform Analysis in Studying Palaeogene Reservoirs in Panyu 4 Depression GUO Shu2jun  ( School of Energy Resources , China Universit y of Geosciences , B ei j ing 100083 , China; Key L aboratory of Ex plora2 tion Technologies f or Oil and Gas Resources  ( Yangtze Universit y ) , Minist ry of Education , J ingz hou 434023 , H ubei , China) CHEN Kai2yuan  ( School of Energy Resources , China Universit y of Geosciences , B ei j ing 100083 , China) TANG Xiao2mei  ( Key L aboratory of Ex ploration Technologies f or Oil and Gas Resources  ( Yangtze Universit y ) , Minist ry of Education , J ingz hou 434023 , H ubei , China) Abstract : Seismic waveform was t he integral reflection of various geologic information including sedimentary facies and lit hologic facies1 Panyu 4 Depression was a duspan2like depression of continental fault depression which was formed by st ructural cont rol1 On t he basis of establishing isochron sequence st ratigraphic f ramework of Panyu 4 Depression , by choosing t he numbers of optimal waveform classifica2 tion , t he seismic waveform in t he sequence f ramework is analyzed and identified effectively , t he areal dist ribution rules of t he waveform characteristics in t he f ramework was studied , t herefore sedimentary facies and favorable reservoir dist ributive characters are analyzed by t he met hod stated above1 Key words : reservoir prediction ; sequence st ratigraphic f ramework ; seismic waveform analysis ; neural network ; Panyu 4 Depression 85 Application of Pre2stack Elastic and itive Parameter Inversion in MXZ Area LU Ming2hua , ZHENG Zhong  ( Research I nstit ute of Geosciences , J iangsu Oi l f iel d Com pany , S I N O P EC, Yangz hou 225009 , J iangsu , China) YANG Jian2li  ( Zhuma Technology L t d1 , Bei j i ng 100083 , China) Abstract : In recent years , reservoir prediction technique has been developed rapidly wit h t he emphasis on subtle reservoir exploration1 In some areas because sand layer was t hin in target zones , sonic wave velocity was high in shales , t raditionalρimpedance inversion could not be used to distinguish t he overlapping of sand and shale rock impedance values , could not meet t he needs of subtle reservoir exploration in complex geologic conditions , while pre2stacke elastic parameter inversion had high resolution capacity to lit hologic recognition1 By using west MXZ Area for example , well data are used to distinguish t he sensitive parameters of sand and shales , t he met hod of pre2stack elastic parameter inversion is employed to determine sand dist ribution , t he area which is beneficial for reservoir growt h is found , and better effect is obtained1 Key words :ρ2impedance ; pre2stack ; elastic and sensitive parameter ; inversion 88 Predicting Biolimestone Reservoir Distribution by Using Seismic Forward and Attribute Analysis ZHANG Xiu2ping  ( I nst it ute of Geosciences , J iangsu Oil f iel d Com pany , S I N O P EC, Yangz hou 225009 , J iangsu , China) Abstract : In t he west slope of Jinhu Depression in Jiangsu Basin , E1f2 biolimestone reservoir was small in overall t hickness , uneven areal dist ribution , fast lateral change , high t hickness difference , t hus t he reservoir t hickness was hard to be recognized by conventional seismic description1 The correlation of biolimestone t hickness and seismic reflecting amplitude and f requency were clarified by establishing seismic forward model for different enclosing rock combinations and different biolimestone t hickness1 Logging was integrated wit h seism , t he bi2 olimestone reservoir dist ribution was predicted by optimizing t he average wave peak amplitude , main f requency att ribute which were bet2 ter correlated wit h biolimestone t hickness changes1 The met hod is practical for heterogeneous reservoir prediction1 Key words : biolimestone ; seismic forward ; seismic att ribute ; reservoir prediction ; nort h Jiangsu Basin ; Jinhu Depression 91 Water2out Zone Logging Interpretation of Low Permeability Reservoirs in Dongpu Depression CHEN Bin  ( Research I nstit ute of Pet roleum Ex ploration and Development , Zhongy uan Oi l f iel d Com pany , S I N O P EC, Puy ang 457001 , Henan , China) 9 CHAO Si2you  ( L og ging Com pany , Zhongy uan Pet roleum Ex plorat ion A dminist ration , Puy ang 457001 , Henan , China) LIU Zhi2yuan  ( Research I nsti t ute of Pet roleum Ex ploration and Development , Zhongy uan Oil f iel d Com pany , S I N O P EC, Puy ang 457001 , Henan , China) WANG Xiang2gong  ( Col lege of Geophysics and Resources , Yangt ze Universit y , J ingz hou 434023 , H ubei , China) Abstract : On t he basis of analyzing t he water2out properties in low permeability reservoirs and in allusion to t he problems of difficult to derive t he resistivity of mixed fluid and smoot h curve altitude of natural potential in low permeability reservoirs , a met hod of relative value of resistivity was used to establish a set of met hods for interpreting remaining oil saturation based on t he relative value of resistivity , by which t he derivation of resistivity in t he mixed fluid was avoided1 Based on t he met hod of movable water analysis , cluster analysis was used to establish a crossplot chartboard for judging water2out zones by using gradation of water saturation and irreducible water satura2 tion , t he influences of lit hology and physical property were eliminated1 Data process and interpretation show t hat t he coincidence rate of water2out zone interpretation is raised wit h good result of geologic application1 Key words : low permeability reservoir ; water2out zone ; logging ; interpreting met hod 95 Evaluating Carbonate Reservoir Fractures by Using Dipole Acoustic Logging NI Guo2hui  ( China N ational L og ging Service Co1 L t d1 , Bei j i ng 100101 , China) Abstract : Shallow marine carbonate reservoirs were developed in T Oilfield , it s lit hology was mainly of limestone and dolomite and t he t ransitional types1 Because f ractures were widely grown in carbonate reservoirs , t he effectiveness of t he f ractures were difficult to be ana2 lyzed deeply by only using conventional logging data and imaging logging data1 Therefore ort hogonal dipole acoustic logging  ( W S T T) data were used to evaluate the f ractures in combination w ith imaging log ging data , it included evaluation of e f f ecti veness and permea2 bilit y evaluation1 S tudy demonst rates that t he up pickup open f ractures in the imaging diagram coul d not be an ef f ective ones1 I n T Oil f iel d , t he e f f ect iveness of f racture area in Cretaceous Reservoi r C is the best , Reservoi r A and B are the nex t , D is the most poor1 Di pole acoust ic log ging data are used f or deepl y understanding the f ractures in T Oil f iel d1 Key words : carbonate reservoir ; dipole acoustic log ; imaging logging ; f racture effectiveness 99 Judging the Fluid Property in Compacted Clastic Reservoirs by Using Crossplot Area ZHANGLing2yun  ( S outhwest B ranch , S I N O P EC L og ging Com pany , Cheng du 610100 , S ichuan , China) Abstract : In t he cent ral depression belt of t he east depression in Baise Basin , t he reservoir characteristics in Nadu Formation were low po2 rosity and low permeability , very high heterogeneity , poor lateral reservoir comparability , t raditional crossplot , P1/ 2 normal dist ribution were employed to judge t he reservoir fluid property , it s interpreting coincidence rate was low1 Based on t he basic data , reservoir charac2 teristics were analyzed1 By st udying t he response characters of reservoir fluid property , it is proposed t hat t he crossplot area of oil and gas indication parameter IOID and parameter m reflecting t he pore st ructure are used to judge t he fluid property1 In t he met hod , t he key pa2 rameters such as porosity , shale content , t hickness , oil saturation and permeability which influence t he reservoir production output are integrated , by which it s interpreting precision and visualized property are raised greatly , fast recognition of compacted reservoir fluid property in Nadu Formation is effectively implemented1 Application effect is evident , it can meet t he needs of oilfield development1 Key words : crossplot area ; reservoir fluid property ; nadu Formation ; Baise Basin 103 Predicting Biol imestone in Thin Layer by Using the Method of Logging Combination Recognition2joint Seismic Inversion LUO Qun  ( B asin and Reservoi r Research Center , China Universit y of Pet roleum , B ei j ing 102249 , China) WEI Jian2rong  ( Gudao Oil Production Plant , S hengli Oil f iel d Com pany , S I N O P EC, Dongying 267000 , S handong , China) Abstract : The t hin biolimestone was an important pet roleum exploration area t hat was ignored in continental deposit basin1 Because of t hin layer , big lateral changes and deep burial , it was difficult to be predicted by using unique conventional met hod1 By predicting t he bio2limestones in t hin layers of Gubei slope area , it is proposed t hat t he met hod of logging combination2joint seismic inversion is used to predict t he biolimestones1 It s basic idea is t hat drilling and log data are first used to establish a pattern for judging t he biolimestone wit h logging curve combination , and t hen t he parameter of biolimestones obtained by pattern recognition is inverted wit h high precision lit hol2 ogy ; based on t he characters of t he biolimestone on t he inversion profile , it extends circumferentially , by which t he areal dist ributive characteristics of t he biolimestones in t hin layers are obtained1 Key words : t hin layer ; biolimestone ; reservoir prediction ; logging ;seism ; inversion ; Gubei slope area 107 Experimental Study on Capacitance Array Tool  ( CA T) L og ging I nterpretat ion in Hi ghl y Deviated Wells HUANG Zhi2jie  ( Facult y of Resources and I nf ormation , China Universi t y of Pet roleum , Bei j i ng 102249 , China; China Of f shore Oil f iel d Service Co1 L t d1 , Yanj iao 065201 , Hebei , China) MA Huan2ying  ( China Of f shore Oi l f iel d Service Co1 L t d1 , Yanj iao 065201 , Hebei , China) GUO Hai2ming , LIU J un2feng , ZHANG Hai2bo  ( Key L aboratory of Ex ploration Technologies of Oil and Gas Resources ,   ( Yangtze Universit y ) , Minist ry of Education , J ingz hou 434023 , H ubei , China) Abstract : In highly deviated wells downhole flow pattern became more complex wit h t he increase of deviation angle , how to determine t he fluid dist ribution on t he section of flow tube and accurately calculate it s water holdup was one of t he problems of production profile logging in highly deviated wells1 CA T was employed to conduct a multi2flow experiment of deviated wells , t he influential factors of CA T logging were analyzed1 Met hods were proposed for calculating water holdup by using CA T logging data1 Application result shows t hat t he met hod is feasible wit h visualized result1 Key words : production logging ; highly deviated well ; CA T ; water holdup 111 Laboratory Study on Chemical Destabil ization and Separation of Waste Drill ing Fluids XUE Yu2zhi  ( College of Pet roleum Engineering , China Universit y
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