断面汇聚脊输导能力定量评价及其控藏作用

doi:10.11885/j.issn.1674-5086.2019.08.04.04

摘要/Abstract

摘要： 为研究旅大16油田油气差异富集原因，利用三维地震、断面曲率属性、三维热史模拟等方法，识别油源断裂断面汇聚脊，定量评价其输导油气能力，从而探讨断面汇聚脊对油气分布的控制作用。结果表明，研究区油源断裂共发育10条断面汇聚脊，断面汇聚脊受断面脊弯曲程度、断层活动性与接触烃源岩热演化程度匹配关系以及走滑压扭三因素耦合控制，输导油气能力差异明显。对比钻探结果，发现断面汇聚脊对于油气成藏具有明显控制作用：（1）断面汇聚脊控制浅层油气分布部位；（2）断面汇聚脊输导能力控制断块油气富集程度。该研究可为复杂断块区高丰度断块的优选提供技术支持与理论参考。

关键词: 断面汇聚脊, 断面曲率, 输导能力, 定量评价, 控藏作用

Abstract: In order to study the causes of differential enrichment of oil and gas in Lüda 16 Oilfield, we identified the convergence ridge of oil source fracture and evaluated their transporting capacity, and explored the controling effect of the convergence ridges of fault on the distribution of oil and gas by means of three-dimensional seismic, curvature property of faults and threedimensional thermal history simulation etc. The results show there are 10 convergence ridges developing in oil source faults in the study area. The transport abilities of converging ridges differ noticeable due to by the coupling of bending degree, matching relationship between activity and source rock and strike-slip tectonic stress. The comparison of drilling results shows that the convergence ridge of fault has obvious control effect on hydrocarbon accumulation:(1) converging ridges of faults control the shallow hydrocarbon distribution; (2) the transport ability of converging ridges control hydrocarbon enrichment degree of fault blocks. The study of convergence ridges of faults has important guiding significance for oil and gas exploration in complex fault block areas. The study can provide technical support and theoretical reference for the optimization of high-abundance fault blocks in complex fault areas.

Key words: convergence ridges of faults, curvature property of faults, transport capacity, quantitative evaluation, controlling effect on hydrocarbon accumulation

中图分类号:

TE122

李虹霖, 张如才, 王冰洁, 张江涛, 王鑫. 断面汇聚脊输导能力定量评价及其控藏作用[J]. 西南石油大学学报(自然科学版), 2020, 42(3): 13-20.

LI Honglin, ZHANG Rucai, WANG Bingjie, ZHANG Jiangtao, WANG Xin. Quantitative Evaluation of Faults Convergence Ridges Transport Capability and Its Controlling Effect on Hydrocarbon Accumulation[J]. 西南石油大学学报(自然科学版), 2020, 42(3): 13-20.

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