济阳坳陷埕岛地区上古生界油气成藏控制因素分析

Analyses of Controlling Factors on Hydrocarbon Accumulation of the Upper Paleozoic in Chengdao Area, Jiyang Depression

景安语

JING Anyu

中国石油化工股份有限公司胜利油田分公司勘探开发研究院, 山东东营 257015

Exploration and Development Research Institute, Shengli Oilfield Company, SINOPEC, Dongying, Shandong 257015, China

为了明确埕岛地区上古生界的勘探方向，应用油气成藏综合分析技术，利用地震和井眼等资料，研究了其构造特征、地层残留和储层发育，探讨了油气成藏条件和成藏主控因素。结果表明，受多期构造运动控制，上古生界呈"纺锤型"分布，断层和地层匹配形成构造和构造-地层圈闭，沙南油源沿断层和不整合面形成的运移网络运至潜山圈闭成藏。油源和运移条件是成藏的首要条件，盖层条件控制成藏的具体层位，圈闭和保存条件是成藏的

In order to clarify the exploration direction of the upper Paleozoic in Chengdao area, this article applied the comprehensive analysis technology of oil and gas accumulation and seismic and borehole data to study its structural characteristics, stratigraphic residual and reservoir development, finally discussing the conditions of oil and gas accumulation and main controlling factors of hydrocarbon accumulation. The results show that the upper Paleozoic is the "spindle type" distribution, structural and structuralstratigraphic traps were formed because of fault and stratigraphic, affected by the multi-period tectonic movements. Hydrocarbon from Shanan sag travelled along the faults and unconformities to buried hill traps. Oil source and migration condition are the prime requirement of reservoir formation and the cap rock condition controls the specific horizons of reservoir formation. Meanwhile, the trap and preservation conditions are the critical factors to reservoir formation, especially the lateral sealing of faults. It is pointed out that the consequent fault block traps, composite traps of structure-strata and traps formed by internal faults are favorable exploration directions for the next step.

国家重大专项《渤海湾盆地精细勘探关键技术》 2016ZX05006

https://doi.org/10.3969/j.issn.1008-2336.2020.01.006