川西坳陷中段须家河组致密砂岩气藏成藏模式探讨

doi:10.3785/j.issn.1008-9497.2016.05.015

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摘要通过分析流体包裹体均一温度和砂岩碳酸盐胶结物氧同位素数据，并结合沉积-埋藏史，研究须家河组流体活动特征，进行储层致密化分析. 在此基础上，结合烃源岩演化、储层致密化、流体活动等研究，探讨川西坳陷须家河组致密砂岩气藏成藏模式. 认为：须家河组具有形成“连续型”气藏的地质条件，砂岩持续致密化，自烃源岩沉积后持续生烃，流体包裹体的显微观测也表明油气充注在持续进行. 据此认为，须家河组气藏成藏模式是“前期边致密边成藏，后期裂缝发育成藏”.

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	尚长健
	朱振宏
	欧光习
	王君
	楼章华

关键词 ：致密砂岩气藏, 成藏模式, 川西坳陷, 须家河组

Abstract：Combined with the burial and thermal history of Western Sichuan Depression, homogenization temperature of geofluid inclusion and oxygen isotope of carbonate cement are used to study the geofluid activity of Xujiahe Formation. And then sandstone densification is analyzed. A study on gas accumulation modes of tight sand gas reservoirs of Xujiahe Formation in the Western Sichuan Depression is conducted based on evolution of hydrocarbon source rocks, sandstone densification and geofluid activities, and so on. It concludes that (i) the Xujiahe Formation of Western Sichuan Depression meets all the factors of continuous tight sand gas reservoir, (ii) the sandstone of Xujiahe Formation continues to be identified, (iii)source rocks of the Xujiahe Formation can continuously produce hydrocarbon since their deposition, and (iv)the microscopic observation of geofluid inclusion shows that hydrocarbon continuously charges. Based on the above results, a model of the Xujiahe Formation gas accumulation is presented, namely gas accumulation is synchronization with sandstone densification in the earlier stage and gas accumulation restarts after cracks formed in the later stage.

Key words： tight sand gas reservoirs gas accumulation mode Western Sichuan Depression Xujiahe Formation

收稿日期: 2014-05-12

ZTFLH:

P534.3

基金资助:“油气藏地质及开发工程”国家重点实验室资助项目（PLC201002）；国家科技重大专项（2011ZX05002-006-003HZ，2011ZX05005-003-008HZ）.

作者简介: 尚长健(1985-),ORCID:http://orcid,org/0000-0002-9408-6225,男,博士,工程师,主要从事地质流体地球化学研究,E-mail:shangchangjian@gmail.com.

引用本文:

尚长健, 朱振宏, 欧光习, 王君, 楼章华. 川西坳陷中段须家河组致密砂岩气藏成藏模式探讨[J]. 浙江大学学报（理学版）, 2016, 43(5): 580-586.
SHANG Changjian, ZHU Zhenhong, OU Guangxi, WANG Jun, LOU Zhanghua. Study on gas accumulation modes of Xujiahe Formation tight sand gas reservoirs, in the middle of Western Sichuan Depression, China. Journal of ZheJIang University(Science Edition), 2016, 43(5): 580-586.

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http://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2016.05.015 或 http://www.zjujournals.com/sci/CN/Y2016/V43/I5/580

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