油源断裂转换带裂缝发育及其对油气控制作用——以冀中坳陷文安斜坡议论堡地区沙二段为例

发布时间：2018-08-27 17:04

【摘要】：在伸展盆地中,油源断裂转换带往往对油气有着重要的控制作用,是油气的有利聚集部位。为了明确油源断裂转换带裂缝发育及其对油气运聚的控制作用,本文利用垂直累积断距-距离曲线法厘定了文安斜坡议论堡构造3条油源断裂的转换带并明确了其分布特征;依据岩心、露头资料、实钻资料和叠前三维地震资料对油源断裂转换带伴生裂缝分布进行了预测模拟;总结了油源断裂转换带对裂缝发育的控制作用,以及二者与油气成藏关系。结果表明:在本研究区油源断裂转换带部位富含砂岩的输导层较发育,应力相对油源断裂其他部位较集中,是裂缝密度高值的发育区,为油气聚集提供优势的运移通道和指向,使油气向低势区汇聚成藏。
[Abstract]:In extensional basins, oil-source fault transition zones often play an important role in controlling oil and gas, and are favorable accumulation sites for oil and gas. In order to clarify the development of oil source fault transition zone and its controlling effect on oil and gas migration and accumulation, this paper uses the vertical cumulative fault distance curve method to determine the transition zones of three oil source faults in the Yiliaobu structure on the Wenan Slope and their distribution characteristics. Based on the core, outcrop data, real drilling data and prestack 3D seismic data, the distribution of associated fractures in the oil-source fault transition zone is predicted and simulated, and the controlling effect of the oil-source fault transition zone on the fracture development is summarized. And the relationship between them and hydrocarbon accumulation. The results show that in the oil-source fault transition zone, the sandstone rich transport layer is relatively developed, and the stress is relatively concentrated in other parts of the oil-source fault, which is the development area with high fracture density, which provides an advantageous migration channel and direction for oil and gas accumulation. Oil and gas converge to low potential areas to form reservoirs.
【作者单位】：东北石油大学地球科学学院;大庆油田公司勘探开发研究院;
【基金】：国家自然科学基金项目(41372153)~~
【分类号】：P618.13

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