姬塬油田麻黄山地区长4+5和长6储集层敏感性差异评价

doi:10.7657/XJPG20220506

新疆石油地质 ›› 2022, Vol. 43 ›› Issue (5): 546-553.doi: 10.7657/XJPG20220506

姬塬油田麻黄山地区长4+5和长6储集层敏感性差异评价

宋雨纯¹(), 黄昊^2a, 周创飞^2b, 柯先启^2c, 唐号迪^2a, 朱玉双¹()

1.西北大学 a.大陆动力学国家重点实验室;b.地质学系,西安 710069
2.中国石油长庆油田分公司 a.第十一采油厂,西安 710021;b.第六采油厂,西安 710200;c.第五采油厂,西安 710200

收稿日期:2022-04-08 修回日期:2022-05-11 出版日期:2022-10-01 发布日期:2022-09-22
通讯作者: 朱玉双 E-mail:734496831@qq.com;yshzhu@nwu.edu.cn
作者简介:宋雨纯（1996-）,女,甘肃庆阳人,硕士研究生,油气田开发,（Tel）17792601460（E-mail） 734496831@qq.com
基金资助:
国家科技重大专项(2017ZX05008-004-004-001);国家自然科学基金(41972129)

Evaluation on Sensitivity Difference Between Chang 4+5 and Chang 6 Reservoirs in Mahuangshan Area of Jiyuan Oilfield

SONG Yuchun¹(), HUANG Hao^2a, ZHOU Chuangfei^2b, KE Xianqi^2c, TANG Haodi^2a, ZHU Yushuang¹()

1. Northwest University, a. State Key Laboratory of Continental Dynamics; b. Department of Geology, Xi’an, Shaanxi 710069, China
2. PetroChina Changqing Oilfield Company, a. No.11 Oil Production Plant, Xi’an, Shaanxi 710021, China; b. No.6 Oil Production Plant, Xi’an, Shaanxi 710200, China;c. No.5 Oil Production Plant, Xi’an, Shaanxi 710200, China

Received:2022-04-08 Revised:2022-05-11 Online:2022-10-01 Published:2022-09-22
Contact: ZHU Yushuang E-mail:734496831@qq.com;yshzhu@nwu.edu.cn

摘要/Abstract

摘要：

为避免储集层敏感性伤害,提高油田采收率,进行姬塬油田麻黄山地区长4+5和长6储集层的敏感性差异研究。在对研究区岩石学特征、物性特征和孔喉结构特征研究的基础上,用岩心开展敏感性实验,对研究区长4+5和长6储集层的敏感性进行评价,并分析造成长4+5和长6储集层敏感性差异的原因。结果表明,姬塬油田麻黄山地区长4+5和长6储集层以岩屑长石砂岩为主;长4+5和长6储集层的平均孔隙度分别为10.6%和9.4%,平均渗透率分别为0.65 mD和0.25 mD,平均面孔率分别为6.84%和3.67%;研究区长4+5和长6储集层总体上均具有弱速敏、弱水敏、弱盐敏、强酸敏和强碱敏的特点;由于长4+5储集层长石和石英含量较高,高岭石含量较低,其碱敏性和水敏性较长6储集层强;长6储集层则因为黏土矿物含量较高,其盐敏性和酸敏性较长4+5储集层强。在后续的储集层改造中,应严格控制注入地层流体的pH值。

关键词: 鄂尔多斯盆地, 姬塬油田, 麻黄山地区, 延长组, 储集层, 敏感性, 储集层保护

Abstract:

In order to avoid sensitivity damage and improve oil recovery, the sensitivity difference between Chang 4+5 and Chang 6 reservoirs in Mahuangshan area of Jiyuan oilfield was studied. Based on the analysis of petrology, physical properties and pore-throat structures of the reservoirs in the study area, sensitivity experiments were carried out with cores, then the sensitivities of Chang 4+5 and Chang 6 reservoirs in the study area were evaluated, and the causes for the sensitivity differences between Chang 4+5 and Chang 6 reservoirs were analyzed. The results show that the Chang 4+5 and Chang 6 reservoirs are dominated by lithic feldspar sandstone, and have the average porosity of 10.6% and 9.4%, the average permeability of 0.65 mD and 0.25 mD, and the average surface porosity of 6.84% and 3.67%, respectively. The Chang 4+5 and Chang 6 reservoirs are generally characterized by weak velocity sensitivity, weak water sensitivity, weak slat sensitivity, strong acid sensitivity and strong alkali sensitivity. The Chang 4+5 reservoir exhibits stronger alkali sensitivity and water sensitivity than the Chang 6 reservoir, for its high content of feldspar and quartz and low content of kaolinite, while the Chang 6 reservoir has stronger salt sensitivity and acid sensitivity than the Chang 4+5 reservoir, for its high content of clay minerals. In the subsequent reservoir stimulation, the pH value of the injected fluid to formation should be strictly controlled.

Key words: Ordos basin, Jiyuan oilfield, Mahuangshan area, Yanchang formation, reservoir, sensitivity, reservoir protection

中图分类号:

TE112.23

宋雨纯, 黄昊, 周创飞, 柯先启, 唐号迪, 朱玉双. 姬塬油田麻黄山地区长4+5和长6储集层敏感性差异评价[J]. 新疆石油地质, 2022, 43(5): 546-553.

SONG Yuchun, HUANG Hao, ZHOU Chuangfei, KE Xianqi, TANG Haodi, ZHU Yushuang. Evaluation on Sensitivity Difference Between Chang 4+5 and Chang 6 Reservoirs in Mahuangshan Area of Jiyuan Oilfield[J]. Xinjiang Petroleum Geology, 2022, 43(5): 546-553.

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姬塬油田麻黄山地区长4+5和长6储集层敏感性差异评价

Evaluation on Sensitivity Difference Between Chang 4+5 and Chang 6 Reservoirs in Mahuangshan Area of Jiyuan Oilfield

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