地学前缘 ›› 2014, Vol. 21 ›› Issue (6): 310-320.DOI: 10.13745/j.esf.2014.06.030

• 论文 • 上一篇    下一篇

鄂尔多斯盆地庆城—合水地区延长组长63储层构造裂缝定量预测

鞠玮，侯贵廷，冯胜斌，赵文韬，张居增，尤源，詹彦，于璇   

  1. 1. 造山带与地壳演化教育部重点实验室; 北京大学 地球与空间科学学院, 北京 100871 2. 中国石油勘探开发研究院, 北京 100083 3. 中国石油长庆油田勘探开发研究院, 陕西 西安 710018
  • 收稿日期:2014-02-20 修回日期:2014-04-03 出版日期:2014-11-15 发布日期:2014-11-15
  • 作者简介:鞠玮(1988—)，男，博士研究生，从事构造裂缝预测与油气勘探研究。E-mail：jw505305073@163.com
  • 基金资助:

    中国石油天然气股份公司“鄂尔多斯盆地致密油勘探开发关键技术研究”重大科技专项(2011E-2602)

Quantitative prediction of the Yanchang Formation Chang 63 reservoir tectonic fracture in the QingchengHeshui Area, Ordos Basin.

  • Received:2014-02-20 Revised:2014-04-03 Online:2014-11-15 Published:2014-11-15

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摘要：

鄂尔多斯盆地庆城—合水地区上三叠统延长组低渗透砂岩是该区的主要储集层，其中构造裂缝系统是油气渗流的重要通道。在岩石力学参数测试的基础上，考虑砂体分布的影响，采用三维有限元法对庆城—合水地区延长组长63储层主要裂缝形成期的古构造应力场进行数值模拟，通过岩心构造裂缝发育程度的约束，预测出庆城—合水地区延长组长63储层构造裂缝发育和分布情况。结果表明：在燕山期和喜马拉雅期不同构造应力作用下，构造裂缝发育和分布情况存在差异。燕山期构造裂缝密度在庄72井、庄47井、宁88井以及正20井附近较高，可以达到0.10 m-1，而喜马拉雅期构造裂缝密度则在庄156井、宁45井以及正20井附近较高；整体上，燕山期构造裂缝密度要比喜马拉雅期构造裂缝密度高。鄂尔多斯盆地庆城—合水地区长63储层构造裂缝发育特征和分布预测成果可为低渗透储层裂缝分布概念模型、裂缝孔隙度计算模型的建立提供基础资料，同时也可为庆城—合水地区的油气勘探提供新的地质依据和指导。

 

关键词: 构造裂缝；长63储层；庆城&mdash, 合水地区；延长组；鄂尔多斯盆地

Abstract:

The Upper Triassic Yanchang Formation sandstone characterized by low permeability is the main reservoir in the Qingcheng—Heshui area of Ordos Basin, within which the tectonic fractures serve as important seepage pathways. On the basis of rock mechanics parameters testing, considering the influence of sandstone distribution, the paleostress field in the main fracture forming period was simulated, and the tectonic fractures were predicted with the constraints of cores using 3D Finite Element Method (FEM). The results show that the Yanshanian tectonic fracture density is high in Well Zhuang 72, Well Zhuang 47, Well Ning 88 and Well Zheng 20 areas, with the density up to 0.10 m-1, while the Himalayan tectonic fracture density is high in Well Zhuang 156, Well Ning 45 and Well Zheng 20 areas. Comparing to the Himalayan tectonic period, the Yanshanian tectonic fracture density as a whole is higher. The study results can provide us basic geological data for building conceptual fracture distribution and fracture porosity calculation model, and are able to support the reservoir prospecting and exploitation as well in the QingchengHeshui area.

Key words:  tectonic fractures, Chang 63 reservoir, QingchengHeshui area, Yanchang Formation, Ordos Basin

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