鄂尔多斯盆地庆阳气田山1段储集层特征及控制因素

doi:10.7657/XJPG20220305

新疆石油地质 ›› 2022, Vol. 43 ›› Issue (3): 285-293.doi: 10.7657/XJPG20220305

鄂尔多斯盆地庆阳气田山1段储集层特征及控制因素

段志强^1a^,^1b(), 夏辉^1a^,^1b(), 王龙^1a^,^1b, 高伟^1a^,^1c, 范倩倩^1a^,^1b, 师威²

1.中国石油长庆油田分公司 a.低渗透油气田勘探开发国家工程实验室;b.勘探开发研究院;c.第二采油厂,西安 710018
2.中国石油东方地球物理公司研究院长庆分院,西安 710021

收稿日期:2021-11-26 修回日期:2022-01-28 出版日期:2022-06-01 发布日期:2022-05-26
通讯作者: 夏辉 E-mail:dzq3_cq@petrochina.com.cn;xiahui_cq@petrochina.com.cn
作者简介:段志强（1973-）,男,内蒙古武川人,高级工程师,硕士,天然气开发地质,（Tel）029-86978571（E-mail） dzq3_cq@petrochina.com.cn
基金资助:
国家科技重大专项(2016ZX05050)

Reservoir Characteristics and Controlling Factors of Shan 1 Member in Qingyang Gas Field, Ordos Basin

DUAN Zhiqiang^1a^,^1b(), XIA Hui^1a^,^1b(), WANG Long^1a^,^1b, GAO Wei^1a^,^1c, FAN Qianqian^1a^,^1b, SHI Wei²

1. PetroChina Changqing Oilfield Company, a.National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields; b.Research Institute of Exploration and Development; c.No.2 Oil Production Plant, Xi'an, Shaanxi 710018, China
2. Changqing Branch, Research Institute of BGP, CNPC, Xi'an, Shaanxi 710021, China

Received:2021-11-26 Revised:2022-01-28 Online:2022-06-01 Published:2022-05-26
Contact: XIA Hui E-mail:dzq3_cq@petrochina.com.cn;xiahui_cq@petrochina.com.cn

摘要/Abstract

摘要：

鄂尔多斯盆地庆阳气田属于典型的致密砂岩气田,主力气层为二叠系山西组山1段,砂体厚度薄且变化快,储集层分布预测难度大,制约气田的产能建设。通过井震结合开展沉积砂体刻画和薄储集层预测,探讨储集层发育的主控因素,明确有利储集层分布区。结果表明：古地貌与古流向共同控制三角洲砂体的分布,溶蚀相发育的水下分流河道砂体为最有利的储集体,局部微幅度鼻隆构造为天然气富集区。综合砂体展布规律、储集层物性、成岩作用、构造特征等因素,建立了研究区储集层分类标准,在研究区南部和中部识别出2个Ⅰ类储集层富集区。

关键词: 鄂尔多斯盆地, 庆阳气田, 致密砂岩气藏, 山西组, 山1段, 储集层特征, 控制因素, 富集区

Abstract:

In the Qingyang gas field, Ordos basin, which is a typical tight sandstone gas field, the major pay zone is the first member of the Permian Shanxi formation. Its sedimentary sand bodies change rapidly with small thickness, making the prediction of reservoir distribution difficult, which restricts the productivity construction of the gas field. In this paper, sedimentary sand body characterization and thin layer prediction were carried out using logging-seismic combination, the main factors controlling reservoir development were discussed, and favorable reservoir distribution areas were identified. The results show that the paleogeomorphology and paleo-flow direction jointly controlled the distribution of delta sand bodies, the underwater distributary channel sand bodies with developed dissolution facies are the most favorable reservoirs, and the local micro-amplitude nose uplift structure is the natural gas enrichment area. Based on the factors such as sand body distribution, reservoir physical properties, diagenesis and structural characteristics, a set of standards for classifying reservoirs in the study area was established, by which two Type I reservoir enrichment areas were defined in the southern and central parts of the study area.

Key words: Ordos basin, Qingyang gas field, tight sandstone gas reservoir, Shanxi formation, Shan 1 member, reservoir characteristic, controlling factor, enrichment area

中图分类号:

TE132.2

段志强, 夏辉, 王龙, 高伟, 范倩倩, 师威. 鄂尔多斯盆地庆阳气田山1段储集层特征及控制因素[J]. 新疆石油地质, 2022, 43(3): 285-293.

DUAN Zhiqiang, XIA Hui, WANG Long, GAO Wei, FAN Qianqian, SHI Wei. Reservoir Characteristics and Controlling Factors of Shan 1 Member in Qingyang Gas Field, Ordos Basin[J]. Xinjiang Petroleum Geology, 2022, 43(3): 285-293.

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成岩相类型	成岩相特征	孔隙发育程度	分布位置
强压实致密相	早期压实作用较强,后期成岩改造较弱	低	分流河道、河口坝砂体顶底边缘
强胶结致密相	压实后石英次生加大边发育	低	分流河道或水下分流河道、河口坝砂体的顶底内部
	绿泥石胶结弱,自生石英胶结强	低
	方解石连晶胶结强	极低
	胶结物类型较多,晚期铁方解石将溶蚀孔隙完全胶结	低,发育微裂缝
溶蚀相	成岩作用复杂,溶蚀作用形成的孔隙被较好地保存下来	溶蚀孔隙发育	水下分流河道中—下部、河口坝中—上部
原生孔隙发育相	绿泥石环边胶结发育,原生粒间孔隙保存较好	原生粒间孔隙发育	分流河道中部、河口坝中—上部

储集层类型	亚段	沉积相区带	沉积微相	砂体厚度/m	孔隙度/ %	渗透率/ mD	含气饱和度/ %	有效砂体厚度/m	成岩相带	构造部位	研究区位置	综合评价
Ⅰ类	山1₃	三角洲前缘	水下分流河道中心、水下分流河道侧翼	>10	>5.70	>0.52	>65	>6.5	溶蚀相+绿泥石胶结相区	北部鼻隆、微幅背斜	北部、南部	好储集层
Ⅱ类	山1₂	平原—前缘过渡区	分流河道侧翼、河口坝	8~10	1.88~5.70	0.14~0.52	>60	4.0~6.5	溶蚀相区	中部微幅背斜	中部	中等储集层
Ⅲ类	山1₁	三角洲平原、滨浅湖	分流河道侧翼、滨浅湖	6~8	<1.88	<0.14	>55	<4.0	强压实—胶结,弱溶蚀相区	中—西部斜坡区	东北部	差储集层

鄂尔多斯盆地庆阳气田山1段储集层特征及控制因素

Reservoir Characteristics and Controlling Factors of Shan 1 Member in Qingyang Gas Field, Ordos Basin

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