超深断控碳酸盐岩缝洞储集体地震预测与井轨迹设计——以顺北油田4号断裂带中北部为例  

Seismic prediction and well trajectory design for ultra-deep fault-controlled carbonate fractured cave reservoirs:Taking the north-central part of fault zone No.4 in the Shunbei Oilfield as an example

作　　者：王来源[1] 龚伟[1] 李弘艳[1] WANG Laiyuan;GONG Wei;LI Hongyan(Exploration and Development Research Institute of Northwest Oilfield Branch,SINOPEC,Urumqi 830011,China)

机构地区：[1]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011

出　　处：《复杂油气藏》2024年第3期288-295,共8页Complex Hydrocarbon Reservoirs

基　　金：中国石化科技项目“超深层碳酸盐岩规模储集体预测与井轨迹设计技术”(P21071-3)。

摘　　要：顺北断控缝洞型油气藏主要受走滑断裂控制,断裂带的活动强度控制了储层发育程度,储集空间主要为断裂破碎形成洞穴、孔洞、裂缝,储层的空间展布非均质性强,缝洞体的空间定位和量化表征是制约井位井型的选择和高效动用的关键。综合测井、地震、地质等资料对顺北4号带断裂北段碳酸盐岩储集体进行立体半定量化表征研究。结果表明,顺北碳酸盐岩储集体沿断裂带呈不规则分布,储集体纵向延伸大(高度50~800 m),沿断裂面非均质性强,走滑断裂带拉分段、平移段及挤压段不同分段的储集体规模、组成差异较明显。拉张段储集体体积空间最大,孔洞占比最高(35%)、裂缝(65%);平移段体积空间较小,洞穴占比较低(44%)、裂缝(56%)。并根据储层预测及储集体空间展布进行井轨迹分类设计,拉分段平面宽度较大、断裂面与储集体夹角在0~30°,采用垂向大斜度角顺穿断裂带,最大限度地钻遇储集体;平移段断面窄,储集规模小,断面与储集体夹角在30~50°,采用垂向中斜坡角斜穿断裂带,钻井揭示储集体长度相比横穿可提高1.8倍,实现高产稳产。上述技术方法取得了良好的钻探效果。The fault-controlled fracture-cave reservoir in Shunbei is mainly controlled by strike-slip faults,and the activity intensity of the fault zone controls the degree of reservoir development.The reservoir space is mainly fractured to form caves,pores,and fractures.The spatial distribution of the reservoir is highly heterogeneous,and the spatial positioning and quantitative characterization of the fractures-cave reservoir is the key to restricting the selection and efficient use of well location and well type.Based on the comprehensive logging,seismic,and geological data,the three-dimensional and semi-quantitative characterization of the carbonate reservoirs in the northern section of the Shunbei Zone No.4 fault is carried out.The results show that the carbonate reservoirs in Shunbei are irregularly distributed along the fault zone,with large longitudinal extension(height of 50 to 800 m)and strong heterogeneity along the fault surface.The size and composition of the reservoirs in different sections of the strike-slip fault zone are different.The tensioning section has the largest reservoir volume space,with the highest proportion of holes(35%)and cracks(65%).The volume space of the translation section is smaller,with a lower proportion of caves(44%)and cracks(56%),the well trajectory classification design is carried out according to the reservoir prediction and reservoir space distribution.The width of the pull segment plane is large,the angle between the fracture plane and the reservoir is 0 to 30°,and the vertical angle of large inclination is adopted to cross the fracture zone to maximize reservoir drilling.The translation section has a narrow section,a small reservoir size,and an angle between the section and the reservoir group of 30 to 50°.The vertical mid-slope angle is used to cross the fault zone,and the drilling reveals that the length of the reservoir group can be increased by 1.8 times compared with the cross-zone to achieve high and stable production.The above techniques and methods have achieved good

关 键 词：地震储层预测 空间定位 井轨迹设计 断控缝洞型储集体 顺北油田 

分 类 号：P631[天文地球—地质矿产勘探]