THE CONDITION AND PATTERN OF TURBIDITE FAN RESERVOIR FORMATION IN EASTERN DONGYING DEPRESSION, SHANDONG PROVINCE
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摘要: 岩性油气藏已成为东营凹陷油气勘探重点。东营凹陷东部在沙三、沙四段沉积时期发育了大量厚层烃源岩, 为圈闭成藏提供了充足的油气资源。勘探证实, 东营凹陷东部发育三角洲前缘滑塌浊积、深水浊积扇等砂体类型, 同时发育断裂型、砂体型、不整合面型等多种输导体系和良好的泥岩盖层。生、储、盖条件在时间、空间上具有良好的组合关系, 为形成砂岩透镜体岩性油气藏和构造-岩性油气藏提供了良好条件。Abstract: Lithologic hydrocarbon reservoir has been thought of a focal point of exploration in Dongying depression.A great amount of massive source rocks developed in Members 3 and 4 of the Shahejie Formation (S3 and S4) in eastern Dongying depression provide sufficient hydrocarbon resources for lithologic traps.In this area there are well developed fluxoturbidite in front of delta, deep-water turbidite fan and other little sand body, and such transportation systems as sand bodies, rifts, and unconformities, as well as mudstone seal, are often met with.There are good matching source rocks, reservoir bed and seal display a good match spatially and temporally, which provided a favourable conditions for formation of lithologic hydrocarbon reservoir and structure-lithologic hydrocarbon reservoir.
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图 1 东营凹陷东部浊积扇体分布示意图
Figure 1. A sketch showing distribution of turbidite fan in eastern Dongying depression
图 2 东营凹陷东部深部浊积扇油藏的疏导体系模式图
①砂体型输导体系; ②断裂型输导体系; ③复合型输导体系; ④不整合面型输导体系
Figure 2. Carrier system model of deep turbidite fan reservoir in eastern Dongying depression
图 3 自生、自储、自盖式砂岩透镜体岩性油气藏成藏模式图
Figure 3. Forming model of self-generation, self-accumulation and self-sealing lenticular sandstone oil/gas reservoirs
图 4 下生上储式砂岩透镜体岩性油气藏成藏模式图
Figure 4. Forming model of lenticular sandstone oil/gas reservoir of injection migration from lower part
图 5 上生下储式砂岩透镜体岩性油气藏成藏模式图
Figure 5. Forming model of lenticular sandstone oil/gas reservoir of injection migration
图 6 a断层-岩性油藏; b断块油藏; c砂岩上倾尖灭岩性油藏
Figure 6. a.Fault-lithologic reservoir; b.Fault block reservoir; c.Lenticular sandstone reservoir
表 1 牛庄洼陷泥岩封盖性能评价
Table 1. Evaluation of sealing ability of mudstone in Niuzhuang Sag
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