岩性油气藏 ›› 2023, Vol. 35 ›› Issue (3): 152–160.doi: 10.12108/yxyqc.20230313

• 地质勘探 • 上一篇    下一篇

塔里木盆地顺北油气田奥陶系断控缝洞型储层特征及成藏模式

卜旭强, 王来源, 朱莲花, 黄诚, 朱秀香   

  1. 中国石化西北油田分公司 勘探开发研究院, 乌鲁木齐 830000
  • 收稿日期:2022-08-18 修回日期:2022-09-28 发布日期:2023-04-25
  • 作者简介:卜旭强（1987—），男，本科，副研究员，主要从事储层与油气成藏综合研究。地址：（830000）新疆乌鲁木齐市新市区长春南路466号西北石油科研生产园区。Email：nanshanjushi123@126.com。
  • 基金资助:
    国家自然科学基金企业创新发展联合基金项目 “克拉通盆地内部走滑断裂体系成因及控藏机制研究——以塔里木盆地为例”（编号： 2022-2025） 与中国石化科技部项目 “顺北超深碳酸盐岩规模储集体发育模式与评价”（编号： P21033-1）、“顺北超深碳酸盐岩高产富集规律与目标评价”（编号： P21033-3） 联合资助。

Characteristics and reservoir accumulation model of Ordovician fault-controlled fractured-vuggy reservoirs in Shunbei oil and gas field，Tarim Basin

BU Xuqiang, WANG Laiyuan, ZHU Lianhua, HUANG Cheng, ZHU Xiuxiang   

  1. Research Institute of Exploration and Development, Northwest Oilfield Company, Sinopec, Urumqi 830000, China
  • Received:2022-08-18 Revised:2022-09-28 Published:2023-04-25

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摘要： 顺北油气田为塔里木盆地重要的产油气区。根据钻井动态、岩心分析、测井、地震等资料,结合酸化压裂曲线及试井资料等对塔里木盆地顺北油气田奥陶系断控缝洞型储层的特征及成藏模式进行了研究。研究结果表明:①顺北油气田奥陶系断控缝洞型储层是伴随走滑断裂发育的一类特殊储层,垂直于断裂带发育,由基岩-裂缝带-洞穴带有序排列组成的多组缝洞集合体,洞穴带和裂缝带是其主要的储集空间,地震上的识别特征为断裂-串珠-杂乱强反射。②研究区规模较大的断控缝洞型储层的改造曲线具有初始泵压低、最大压降大,停泵压力低等特征,北东断裂体系的①号、④号、⑧号断裂带的钻井压力恢复曲线均呈"W"-箱形形态。③按照地震响应特征和试井压力恢复曲线形态可将研究区的断控缝洞型储层划分为洞穴型和裂缝型两大类,按试井压力恢复曲线形态可细分为裂缝-多洞穴型、裂缝-洞穴型、洞穴-裂缝型和裂缝型4类。④研究区断控缝洞型油气藏油源来自于玉尔吐斯组,沿走滑断裂运移,以孔洞和裂缝为储集空间,盖层为致密碳酸盐岩和巨厚泥岩。

关键词: 酸化压裂曲线, 试井压力恢复曲线, 断裂带, 断控缝洞型储层, 奥陶系, 顺北油气田, 塔里木盆地

Abstract: Shunbei oil and gas field is an important oil and gas producing area in Tarim Basin. Based on drilling performance，core analysis，logging and seismic data，combined with acid fracturing curve and well test data， the characteristics and reservoir accumulation model of Ordovician fault-controlled fractured-vuggy reservoirs in Shunbei oil and gas field of Tarim Basin were studied. The results show that：（1）Fault-controlled fractured-vuggy reservoir of Ordovician in Shunbei oil and gas field is a special type of reservoir formed with the development of strike-slip faults. Vertical to the fault zone，multiple groups of fractured-vuggy aggregates composed of bedrockfracture zone-cave zone are developed，and cave zone and fracture zone are the main reservoir spaces. The seismic identification feature of large-scale reservoirs is fault-bead-disorder strong reflection.（2）The reconstruction curve of large-scale fault-controlled fractured-vuggy reservoirs in the study area has the characteristics of low initial pump pressure，large maximum pressure drop and low pump stop pressure. The drilling pressure recovery curves of fault zones ①，④ and ⑧ of the NE fault system are in a W-box shape.（3）According to the characteristics of seismic response and the shape of well test pressure recovery curve，the fault-controlled fractured-vuggy reservoirs in the study area can be divided into two types： cave type and fracture type，and they can be subdivided into four categories according to the shapes of pressure recovery curves： fractured-multi-cave type，fracturedcave type，cave-fracture type and fracture type.（4）The fault-controlled fractured-vuggy reservoirs in the study area have oil source from Yuertusi Formation，and migrate along strike-slip faults. The pores and fractures are the reser-voir spaces， and tight carbonate rocks and thick mudstones are the caprocks.

Key words: Acidizing fracturing curve, well test pressure recovery curve, fault zone, fault-controlled fracturedvuggy reservoir, Ordovician, Shunbei oil and gas field, Tarim Basin

中图分类号: 

  • TE122.2
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