中国海相盆地油气保存条件主控因素与评价思路

发布时间：2018-01-10 01:32

本文关键词：中国海相盆地油气保存条件主控因素与评价思路　出处：《岩石学报》2017年04期 　论文类型：期刊论文

【摘要】：中国海相盆地具有多旋回演化、盆-山结构复杂、稳定性差的特点,油气保存条件是制约油气勘探的关键因素。本文在对中国海相盆地构造改造特征和油气藏破坏方式分析的基础上,对影响油气保存条件的主控因素进行了总结,提出了海相多旋回强改造盆地油气保存条件评价的思路方法。中国海相盆地构造演化具有"五世同堂、同序异时"的特点,燕山中晚期和喜马拉雅期是影响油气保存的关键构造变革期。海相油气藏的破坏方式主要有断裂切割、抬升剥蚀、褶皱变动、深埋裂解、岩浆烘烤、流体冲洗、生物降解和长期扩散等8种主要方式。构造、盖层、热体制、流体活动和时间是控制保存环境及其动态演化的主控因素。中国海相盆地油气保存系统的评价思路为,以上述5种主控因素动态分析评价为基础,以地质结构和源-盖组合为依据划分评价单元,以源-盖动态演化,今、古流体系统演化和油气藏动态成藏过程研究为重点,动态地评价油气保存系统,进而优选有利的保存单元。
[Abstract]:Multi cycle evolution has China marine basin, basin mountain features complex structure, poor stability, oil and gas preservation conditions are the key factors to control the oil and gas exploration. This paper based on the analysis of failure mode in the marine basin tectonic characteristics and hydrocarbon reservoir Chinese transformation, the main control effect of oil and gas preservation conditions factors summarized, put forward the idea of method of multi cycle basin reconstruction in marine oil and gas preservation condition evaluation. With "five generations of tectonic Chinese marine basin evolution, characteristics of the same sequence of different", Yanshan and Himalaya in the late period is of key structural reforms in oil and gas preservation. The failure mode of marine oil and gas reservoirs there are faults cutting, uplift and denudation, fold alteration, fluid flushing of deep magma, cracking, baking, 8 main ways of biological degradation and long term diffusion. Structure, cover layer, thermal system, fluid flow and time control is the preservation of the environment The main control factors and its dynamic evolution. Chinese marine basin oil and gas preservation system for the evaluation of ideas, with the dynamic of the 5 main controlling factors analysis and evaluation based on the geological structure and source - cap combination according to the division of evaluation unit, the source cover dynamic evolution, this accumulation process research focus on reservoir dynamic the ancient fluid system evolution and hydrocarbon, the dynamic evaluation of oil and gas preservation system, and preferably favorable preservation unit.

【作者单位】：页岩油气富集机理与有效开发国家重点实验室;中国石化石油勘探开发研究院构造与沉积储层实验室;
【基金】：国家科技重大专项(2016ZX05005-001) 国家重点基础研究发展计划(2012CB412800)联合资助
【分类号】：P618.13
【正文快照】： 1 引言 20世纪50年代,“四川会战”拉开了中国海相油气勘探的大幕。在“背斜找油”理论的指导下,四川盆地先后发现了以威远气田为代表的10多个中小型气田。此后经历了40多年的储量缓慢增长阶段。近15年来,中国海相领域油气勘探进入了储量快速增长期,探明储量年均增长2×108吨

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