胡状集地区地震岩性反演与储层预测
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摘要
应用层序地层学和地震岩性反演相结合的方法对东濮凹陷胡状集地区有利的储层发育区进行了预测。依据高分辨率层序地层学原理和岩芯资料 ,测井曲线及测井解释结果 ,将目的层划分为 4个中期旋回和 16个短期旋回 ,它们分别对应沙河街组三段中亚段 2砂组—下亚段 3砂组。依据这种对应关系 ,通过连井剖面和骨干剖面 ,进行三维地震解释 ,应用JASON软件系统和波阻抗合成声波测井法对目的层进行了岩性反演。反演结果认为 ,波阻抗最高值和最低值分别在胡 99井区和胡 98井区 ,平均砂岩百分比和平均孔隙度最高值发育在胡 99和胡 97井区 ,其在地震剖面上表现为反射异常体 ,推断为水下扇 ,是为有利的勘探远景区
Sequence stratigraphy and seismic lithologic inversion were used to predict favourable reservoir developed area in Huzhuangji Region,Dongpu Depression.According to high resolution sequence stratigraphic principle,rock cores,log curves and the results of log interpretation,the sediments in the study area could be divided into 4 medium term cycles and 16 short term cycles which correspond to the second～third sand groups of the middle submember and the third sand group of the lower submember of Sha 3 member.Then 3 D seismic interpretation was made and 3 fractures were found.JASON software and wave impedance synthetic acoustic impedance log were used to make seismic lithologic inversion on the favorable reservoirs.The results indicate that the maximum value and the miminum value are in Hu 99 Well district and Hu 98 Well district respectively;the highest values of average sandstone percentage and average porosity are also in Hu 99 Well district.Seismic profile also showed abnormal seismic reflectance.This suggests that it may be a subaqueous fan which is favourable for oil exploration.
Sequence stratigraphy and seismic lithologic inversion were used to predict favourable reservoir developed area in Huzhuangji Region,Dongpu Depression.According to high resolution sequence stratigraphic principle,rock cores,log curves and the results of log interpretation,the sediments in the study area could be divided into 4 medium term cycles and 16 short term cycles which correspond to the second～third sand groups of the middle submember and the third sand group of the lower submember of Sha 3 member.Then 3 D seismic interpretation was made and 3 fractures were found.JASON software and wave impedance synthetic acoustic impedance log were used to make seismic lithologic inversion on the favorable reservoirs.The results indicate that the maximum value and the miminum value are in Hu 99 Well district and Hu 98 Well district respectively;the highest values of average sandstone percentage and average porosity are also in Hu 99 Well district.Seismic profile also showed abnormal seismic reflectance.This suggests that it may be a subaqueous fan which is favourable for oil exploration.
引文
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2 陈开远,刘学峰,杜宁平,等新港地区沙三段三维地震层序地层特征,地球科学,2000,25(3):267～272
3 陈开远,孙爱霞,杜宁平,等成油体系中的层序地层学[J].石油与天然气地质,1998,19(3):221～226
4 AinsworthRB ,SanlungM ,DuivenvoordenTC .Correlationtechniques,performationstrategies,andrecoveryfactors:anintegrated3Dreservoirmodelingstudy,SirkitField,Thailand[J].AAPGBull,1999,83(10):1535～1551
5 BrinkGJ,KeenanJHG ,BrownLF .Depositionoffourth order,post riftsequencesandsequencesets,lowerCretaceous(loweValanginiantolowerAptian),PletmosBasin,southernoffshore,SouthAfrica[A].In:WeimerP ,PosamentierH .siliciclasticsequencestratigraphy—recentdevelopmentsandapplications[C].AAPGMemoir,1995,58:43～69
6 黄捍东,贺振华,刘洪昌测井构造约束地震资料目标反演[J]石油地球物理勘探,1999,34(5):395～600
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