东濮凹陷三叠系致密砂岩储层裂缝与油气成藏

王萍霞; 巩磊; 杜宜静; 高帅; 翁剑桥; 苏惠; 黄建国

doi:10.3981/j.issn.1000-7857.2014.22.010

PDF(2283 KB)

科技导报 ›› 2014, Vol. 32 ›› Issue (22) : 62-66. DOI: 10.3981/j.issn.1000-7857.2014.22.010

研究论文

东濮凹陷三叠系致密砂岩储层裂缝与油气成藏

作者信息 -

1. 中国石油化工股份有限公司中原油田勘探开发研究院, 濮阳457001;
2. 东北石油大学地球科学学院, 大庆163318;
3. 中国石油大学（北京）地球科学学院, 北京102249;
4. 中国石油勘探开发研究院, 北京100083

作者简介:

王萍霞，工程师，研究方向为油气勘探开发，电子信箱：1244496071@qq.com

Relationship Between Fractures and Hydrocarbon Accumulation of Triassic Tight Sandstones in the North of Dongpu Depression

Author information -

1. Research Institute of Exploration & Development, Zhongyuan Oilfield Company, Sinopec, Puyang 457001, China;
2. College of Earth Sciences, Northeast Petroleum University, Daqing 163318, China;
3. College of Geosciences, China University of Petroleum, Beijing 102249, China;
4. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

摘要

根据露头、岩心、薄片观察、成像测井、声发射实验、包裹体测温、原油族组成、原油组分碳同位素分析等技术，在分析裂缝分布特征和成藏特征的基础上，探讨了东濮凹陷北部三叠系裂缝形成期次与油气成藏的匹配关系。研究认为，研究区以构造裂缝为主。裂缝及其溶蚀孔洞的孔隙度平均为2.25%，渗透率为40×10^-3 μm²左右，是主要的储集空间和渗流通道。三叠系致密砂岩储层裂缝主要分两期形成，分别为燕山运动期和喜马拉雅运动期。三叠系储层油源为古近系沙三段和沙四段烃源岩，其生烃高峰期主要为东营组沉积末期-馆陶组沉积时期（晚期裂缝形成时期），而造成三叠系砂岩致密的压实、胶结等成岩作用主要在新生代以前完成。油气生成时期与喜马拉雅期有效裂缝的形成时间匹配良好，而与基质孔隙的发育匹配关系较差，从而造成研究区裂缝含油，砂岩的基质孔隙基本不含油。

Abstract

The distribution of the natural fractures controls the distribution and the accumulation of the hydrocarbon reservoir in the Triassic of Wenmingzhai area, Dongpu depression. The formation time of the fractures and the relationship between the effective evolution law and the hydrocarbon generation peak determine the behavior of the hydrocarbon reservoir. Based on the data of outcrops, cores, thin sections, logs, sound emission experiments, fluid inclusion analyses, oil component analyses and carbon isotope analyses, the distribution characteristics of the fractures, the fracture sequence and the relationship between the fractures and the hydrocarbon accumulation are discussed. The results show that the structural fracture is the dominant fracture type in the reservoirs of Triassic tight sandstone in the north of Dongpu Depression. The average porosity of the fractures and the related dissolved pores is 2.25%, and the average permeability is about 40×10^-3 μm². The fractures and the related dissolved pores are important storage spaces and seepage channels. The fractures of the tight sandstone reservoir of Triassic are formed in two stages. The oil sources of Triassic are the source rocks of Sha3 and Sha4 Member of Palaeogene whose peak period of the hydrocarbon generation is the period when the Dongying-Guantao Formation is formed. But the diagenesis was completed before Cenozoic. The period of the hydrocarbon generation is well matched with the effective fractures, while it is poorly matched with the pores. It follows that the oil is contained in the fractures rather than in pores. The distribution of oil reservoirs is controlled by the development of fractures and high part of the structure.

导出引用

王萍霞, 巩磊, 杜宜静, 高帅, 翁剑桥, 苏惠, 黄建国. 东濮凹陷三叠系致密砂岩储层裂缝与油气成藏[J]. 科技导报, 2014, 32(22): 62-66 https://doi.org/10.3981/j.issn.1000-7857.2014.22.010

WANG Pingxia, GONG Lei, DU Yijing, GAO Shuai, WENG Jianqiao, SU Hui, HUANG Jianguo. Relationship Between Fractures and Hydrocarbon Accumulation of Triassic Tight Sandstones in the North of Dongpu Depression[J]. Science & Technology Review, 2014, 32(22): 62-66 https://doi.org/10.3981/j.issn.1000-7857.2014.22.010

中图分类号： TE112

参考文献

[1] 赵良金, 杨广林, 王瑞飞, 等. 东濮凹陷裂缝性砂岩油气藏主控因素及成藏模式[J]. 石油勘探与开发, 2010, 37(2): 196-202. Zhao Liangjin, Yang Guanglin, Wang Ruifei, et al. Key controlling factors and reservoir forming model of the fractured sandstone reservoirs in Dongpu Sag[J]. Petroleum Exploration and Development, 2010, 37(2): 196-202.
[2] Zeng L B, Su H, Tang X M, et al. Fractured tight sandstone oil and gas reservoirs: A new play type in the Dongpu Depression, Bohai Bay Basin, China[J]. AAPG Bulletin, 2013, 97(3): 363-377.
[3] 苏惠. 东濮凹陷北部中生界砂岩裂缝型油气藏分布规律研究[D]. 北京: 中国地质大学（北京）, 2009: 1-12. Su Hui. Distribution of Mesozoic fractural sandstone reservoirs in North DongPu depression[D]. Beijing: China University of Geosciences, 2009: 1-12.
[4] 陈书平, 漆家福, 王德仁, 等. 东濮凹陷断裂系统及变换构造[J]. 石油学报, 2007, 28(1): 43-49. Chen Shuping, Qi Jiafu, Wang Deren, et al. Fault systems and transfer structures in Dongpu Sag[J]. Acta Petrolei Sinica, 2007, 28(1): 43-49.
[5] 周新科, 许化政. 东濮凹陷地质特征研究[J]. 石油学报, 2007, 28(5): 20-26. Zhou Xinke, Xu Huazheng. Discussion on geological features of Dongpu Depression[J]. Acta Petrolei Sinica, 2007, 28(5): 20-26.
[6] 赵俊峰, 纪友亮, 陈汉林, 等. 电成像测井在东濮凹陷裂缝性砂岩储层评价中的应用[J]. 石油与天然气地质, 2008, 29(3): 383-390. Zhao Junfeng, Ji Youliang, Chen Hanlin, et al. Application of EMI in evaluation of fractured sandstone reservoirs in the Dongpu Sag[J]. Oil & Gas Geology, 2008, 29(3): 383-390.
[7] 沈万杰, 苏惠, 巩磊, 等. 东濮凹陷三叠系砂岩潜山油气藏裂缝特征[J]. 断块油气田, 2009,16(4):19-21. Shen Wanjie, Su Hui, Gong Lei, et al. Fracture characteristics of buried-hill reservoirs of Triassic sandstone in the north of Dongpu Depression[J]. Fault-Block Oil & Gas Field, 2009,16(4):19-21.
[8] 曾联波, 巩磊, 祖克威, 等. 柴达木盆地西部古近系储层裂缝有效性的影响因素[J]. 地质学报, 2012, 86(11): 1809-1814. Zeng Lianbo, Gong Lei, Zu Kewei, et al. Influence factors on fracture validity of the Paleocene reservoir, western Tsaidam Basin[J]. Acta Geologica Sinica, 2012, 86(11): 1809-1814.
[9] 曾联波, 高春宇, 漆家福, 等. 鄂尔多斯盆地陇东地区特低渗透砂岩储层裂缝分布规律及其渗流作用[J]. 中国科学D辑: 地球科学, 2008, 38(S1): 41-47. Zeng Lianbo, Gao Chunyu, Qi Jiafu, et al. Seepage and distribution of fractures in the ultra-low permeability sandstone reservoirs of Longdong erea Ordos basin[J]. Science in China, Series D: Earth Science, 2008, 38(S1): 41-47.
[10] 曾联波, 柯式镇, 刘洋. 低渗透储层裂缝研究方法[M]. 北京: 石油工业出版社, 2010: 14-37. Zeng Lianbo, Ke Shizhen, Liu Yang. Research methods for fractures in the low-permeability reservoirs[M]. Beijing: Petroleum Industry Press, 2010: 14-37.
[11] 夏斌, 刘朝露, 陈根文. 渤海湾盆地中新生代构造演化与构造样式[J]. 天然气工业, 2006, 26(12): 57-60. Xia Bin, Liu Chaolu, Chen Genwen. Meso-Cenozoic tectonic evolution and tectonic styles in the Bohai bay basin[J]. Natural Gas Industry, 2006, 26(12): 57-60.
[12] 侯贵廷, 钱祥麟, 蔡东升. 渤海湾盆地中、新生代构造演化研究[J]. 北京大学学报: 自然科学版, 2001, 37(6): 845-851. Hou Guiting, Qian Xianglin, Cai Dongsheng. The tectonic evolution of Bohai Basin in Mesozoic and Cenozoic time[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2001, 37(6): 845-851.
[13] 漆家福, 张一伟, 陆克政, 等渤海湾盆地新生代构造演化[J]. 石油大学学报: 自然科学版, 1995, 19(S1): 1-6. Qi Jiafu, Zhang Yiwei, Lu Kezheng, et al. Cenozoic tectonic evolution in Bohai Bay basin province[J]. Journal of the University of Petroleum, China, 1995, 19(S1): 1-6.
[14] 张亚敏, 吕延仓, 徐林丽, 等. 东濮凹陷兰聊断裂带构造演化与油气勘探[J]. 石油与天然气地质, 2000, 21(1): 57-60. Zhang Yamin, Lü Yancang, Xu Linli, et al. Structural evolution and hydrocarbon exploration of Lanliao fault belt in Dongpu depression[J]. Oil & Gas Geology, 2000, 21(1): 57-60.
[15] 苏惠, 曲丽萍, 张金川, 等. 渤海湾盆地东濮凹陷天然气成藏条件与富集规律[J]. 石油实验地质, 2006, 28(2): 123-128. Su Hui, Qu Liping, Zhang Jinchuan, et al. The reservoir-forming condition and enrichment rule of the natural gas in the DongPu depression, the Bohaiwan basin[J]. Petroleum Geology & Experiment, 2006, 28(2): 123-128.
[16] 李忠, 寿建峰, 王生朗. 东濮凹陷砂岩储层成岩作用及其对高压致密气藏的制约[J]. 地质科学, 2000, 35(1): 96-104. Li Zhong, Shou Jianfeng, Wang Shenglang. Digenesis of sandstone reservoirs: Constraints on high-pressure tight gas deposits in DongPu depression, north China[J]. Scientia Geology Sinica, 2000, 35(1): 96-104.