黄骅拗陷隐性断裂带分布及其对油气的控制作用  

Distribution control hydrocarbon effects of hidden fault zones in the Huanghua Depression

作　　者：单晨晨 温明明[1] 冯强强[1] Shan Chenchen;Wen Mingming;Feng Qiangqiang(Guangzhou Marine Geological Survey, Guangzhou, Guangdong 510000, China)

机构地区：[1]广州海洋地质调查局

出　　处：《天然气技术与经济》2019年第3期1-6,共6页Natural Gas Technology and Economy

基　　金：国家重点研发计划“近海底高精度水合物探测技术”(2016YFC0303900)

摘　　要：为了研究隐性断裂带对油气成藏的控制作用,在渤海湾盆地黄骅拗陷共识别出两种类型八条隐性断裂带,其活动性的差异导致该区隐性断裂带的演化程度不一,构造特征不同。研究区隐性断裂带主要分布在中部的歧口凹陷和南部的孔南地区,以贯穿孔南地区南北向基底走滑型隐性断裂带和东西向调节构造型羊三木等隐性断裂带为研究对象,分析了不同类型隐性断裂带的油气地质意义。研究结果表明:①活动的隐性断裂带是油气聚集的有利场所,对烃源岩的热演化有着重要的控制作用;②复杂的构造活动会形成大量裂缝,可大大改善油气输导能力;③隐性断裂带延伸至深部油气储层,很好地起到了输导油气的作用。隐性断裂带对成藏圈闭类型及规模有着重要的影响,研究发现其演化程度与油气输导能力呈正相关,因而可以定性地确定隐性断裂带末期断面贯通时,油气输导能力达到最大,即是油气运移的最佳时间。结论认为,通过研究隐性断裂带对油气的控制作用,可以为油气勘探提供新思路和新方向。In order to investigate the control effect of hidden fault zones on hydrocarbon accumulation, 8 hidden fault zones of two types were identified in the Huanghua Depression. The petroleum geological significance of differ. ent types of hidden fault zones were analyzed with the NS trending hidden fault zone of basement strike slip type running through the Kongnan area and the EW trending hidden fault zone of accommodation structure type as the re. search objects. And the following research results were obtained. First, active hidden fault zones are the favorable lo. cations for hydrocarbon accumulation and they have an important control effect on the thermal evolution of source rocks. Second, complex tectonic activities can result in a great number of fractures, so as to improve the hydrocarbon transport capacity greatly. Third, hidden fault zones extend to deeper oil and gas reservoirs and act for hydrocarbon transport well. Hidden fault zones have an important effect on the types and sizes of hydrocarbon accumulation traps, and the research results show that the evolution degree of hidden fault zone is in positive correlation with hydrocar. bon transport capacity, so it can be qualitatively determined that the hydrocarbon transport capacity is the maximum when the fault surface is through at the end stage of hidden fault zone, i.e., the optimal hydrocarbon migration time.

关 键 词：渤海湾盆地 黄骅拗陷 隐性断裂带 烃源岩演化 油气运移 

分 类 号：P618.13[天文地球—矿床学]