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现代地质 ›› 2023, Vol. 37 ›› Issue (02): 283-295.DOI: 10.19657/j.geoscience.1000-8527.2022.058

• 构造地质学 • 上一篇    下一篇

塔里木盆地富满油田F19断裂发育特征及演化模式

张银涛1(), 陈石2,3(), 刘强1, 冯光4, 谢舟1, 梁鑫鑫2,3, 李婷1, 宋兴国2,3, 康鹏飞1, 彭梓俊1   

  1. 1.中国石油塔里木油田分公司勘探开发研究院,新疆 库尔勒 841000
    2.中国石油大学(北京) 油气资源与探测国家重点实验室,北京 102249
    3.中国石油大学(北京) 地球科学学院,北京 102249
    4.中国石油塔里木油田分公司塔中采油气管理区,新疆 库尔勒 841000
  • 收稿日期:2022-04-11 修回日期:2022-07-26 出版日期:2023-04-10 发布日期:2023-05-23
  • 通讯作者: 陈石
  • 作者简介:陈 石,男,副教授,1986年出生,构造地质学专业,主要从事含油气盆地构造分析研究。Email: chenshi4714@163.com
    张银涛,男,高级工程师,1985年出生,构造地质学专业,主要从事塔里木盆地石油地质研究。Email: zhyt-tlm@petrochina.com.cn
  • 基金资助:
    国家自然科学基金企业创新发展联合基金项目(U21B2062)

Development Characteristics and Evolution Model of F19 Fault in Fuman Oilfield, Tarim Basin

ZHANG Yintao1(), CHEN Shi2,3(), LIU Qiang1, FENG Guang4, XIE Zhou1, LIANG Xinxin2,3, LI Ting1, SONG Xingguo2,3, KANG Pengfei1, PENG Zijun1   

  1. 1. Research Institute of Petroleum Exploration and Development, PetroChina Tarim Oilfield Company, Korla,Xinjiang 841000, China
    2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
    3. Basin and Reservoir Research Center, China University of Petroleum (Beijing), Beijing 102249, China
    4. Tazhong Oil and Gas Production Management Area, PetroChina Tarim Oilfield Company, Korla,Xinjiang 841000, China
  • Received:2022-04-11 Revised:2022-07-26 Online:2023-04-10 Published:2023-05-23
  • Contact: CHEN Shi

摘要:

富满油田目前是塔里木盆地断控缝洞型储层油气开发热点区块,F19断裂带属于目前重点增储上产区,但断裂发育特征及形成机制尚不明确。利用相干、最大似然及储层振幅变化率等多种地震属性,对新采集处理的三维地震进行精密解释,厘定断裂平剖发育特征,表征断裂空间展布结构;基于地层垂向升降幅度及断裂破碎带宽度,反映断裂活动强度;结合断裂变形特征与周缘造山带活动规律,分析了断裂演化期次并建立了断裂发育模型;叠加储层发育特征与断裂展布规律,初步分析了断裂对储层的控制作用。研究结果表明,断裂具有显著平面分段特征,依据走向变化由北往南可大致划分为3段,北段、中段和南段;垂向上依据断裂变形特征,由下往上,可划分为下构造层(T∈3以下)、中构造层(T∈3—TO3t)以及上构造层(TO3t以上)。断裂的形成与演化具有多期性, F19断裂的演化过程可大致划分为三个阶段:加里东早期(中晚寒武世末)、加里东中期(奥陶纪)及加里东晚期(志留纪),且在该区域的主要活动阶段为加里东中期,具有多幕性。储层平面上集中分布于走滑断裂破碎带内,沿F19断裂走向储层发育强度存在显著差异,整体上由南往北逐渐减弱,与断裂活动强度相关。受加里东中期断裂发生多幕活动影响,奥陶系碳酸盐储层分布具有垂向多层分布的特征。受塔北断裂体系与塔中断裂体系的共同影响,加里东早期研究区最大主应力由南往北发生逆时针偏转,逐渐由NNE向过渡至近南北向,发育了两组X型小角度相交断裂,并奠定了研究区内F19断裂展布形态。

关键词: 塔里木盆地, 富满油田, F19断裂, 多期演化, 成因机制

Abstract:

At present, the Fuman oilfield is a hot area for oil and gas development of fault-controlled fracture-cave reservoirs in the Tarim basin. F19 fault zone belongs to a current key reservoir-increasing area, but the development characteristics and formation mechanism of the faults are unclear. By using various seismic attributes, such as coherence, maximum likelihood and reservoir amplitude change rate, the newly acquired and processed three-dimensional seismic data are accurately interpreted, the development characteristics of fault profile are determined, and the spatial fault structural distribution is characterized. Based on the vertical stratigraphic displacement and the fault zone width, the fault activity intensity is inferred. Combined with the characteristics of fault deformation and the activity patterns of the peripheral orogenic belts, the fault evolution stages are analyzed and the fault development model is established. Superimposing the reservoir development characteristics and the fault distribution patterns, the fault controlling effect on the reservoir is preliminarily analyzed. The study shows that the fault has remarkable plane segmentation characteristics, which can be roughly divided into three segments (north, middle, and south) according to strike variation, and into the lower structural layer (below T∈3), the middle structural layer (T∈3-TO3t) and the upper structural layer (above TO3t) according to the fault deformation characteristics. The fault formation and evolution are multistage, and the F19 fault evolution comprises roughly of three stages: Early Caledonian (late Middle Cambrian), Middle Caledonian (Ordovician) and Late Caledonian (Silurian), among which the Middle Caledonian stage is the most active stage. The reservoir plane is mainly distributed in the strike-slip fault zone, with major differences in the reservoir development strength along the F19 fault strike. It weakens gradually from south to north, which is related to the faulting intensity. Affected by the multistage Middle Caledonian faulting, the Ordovician carbonate reservoir distribution is featured by vertical multi-layer distribution. Under the joint influence of Tabei and Tazhong fault systems, the local maximum principal stress in the Early Caledonian may have deflected counterclockwise from south to north, and gradually transferred from NNE to near NS. Two groups of X-type small-angle intersecting faults were developed, which established the local distribution pattern of F19 fault.

Key words: Tarim basin, Fuman oilfield, F19 fault, multistage evolution, formation mechanism

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