复杂断裂成藏带滚动勘探开发研究方法浅析——以王集油田深层系核三下亚段为例
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摘要
王集油田断裂系统发育、多物源砂体叠置、地震品质较差等因素制约了该区深层系核三下亚段滚动勘探开发。针对这种复杂的地质条件,必须在研究过程中切实做到地震地质有机衔接。首先分别开展地质上的油组统层细分对比和全区断裂系统空间解释;其次以层位精细标定为基础,地震地质紧密结合,地震、地质连井大剖面相互验证,进一步确定油组界限及断裂解释的合理性;然后在开展全区的全三维解释的同时,结合测井、试油、试采及生产动态资料,对小断层、小断块及单砂层分布特点进行深入研究,搞清全区已知各类井的油水关系;最后研究总结全区油气聚集规律,开展圈闭综合评价,提供钻探目标。通过这套研究方法,最终发现不同物源砂体展布变化及"椅式"断裂发育是控制王集油田深、浅层系油气聚集的两个主要因素,科学指导了滚动勘探开发部署,效果显著。
The rolling exploration and development of lower member of Eh3 in the deep zone of Wangji Oilfield was constrained by the development of fracture system,superposition of multi-source sand-bodies,poor quality of seismic data and other factors.In view of such complex geological conditions,the organic integration of seismic and geology was essential during the research process.First of all,fracture space interpretation and stratigraphic correlation should be carried out respectively;secondly fracture interpretation and rationality of oil formation boundary should be further verified based on fine horizon calibration by using the combination of seismic-geologic connecting-well profiles;thirdly fine structural interpretation of the whole area,a further study on the distribution features of small fault,small fault-block and small sandbodies were carried out in combination with logging,oil testing and dynamic production data to clarify the oil-water relation of different types of wells in the area;finally,a comprehensive evaluation of traps was carried out to provide drilling targets based on the summary of hydrocarbon distribution and accumulation regularity.By using the method,it is found out that different sandbody distributions from various sources and the development of chair-like faults are the two dominant controlling factors for the deep hydrocarbon accumulation in Wangji Oilfield,it provides scientific guidance for rolling exploration and development and it achieves remarkable effect.
The rolling exploration and development of lower member of Eh3 in the deep zone of Wangji Oilfield was constrained by the development of fracture system,superposition of multi-source sand-bodies,poor quality of seismic data and other factors.In view of such complex geological conditions,the organic integration of seismic and geology was essential during the research process.First of all,fracture space interpretation and stratigraphic correlation should be carried out respectively;secondly fracture interpretation and rationality of oil formation boundary should be further verified based on fine horizon calibration by using the combination of seismic-geologic connecting-well profiles;thirdly fine structural interpretation of the whole area,a further study on the distribution features of small fault,small fault-block and small sandbodies were carried out in combination with logging,oil testing and dynamic production data to clarify the oil-water relation of different types of wells in the area;finally,a comprehensive evaluation of traps was carried out to provide drilling targets based on the summary of hydrocarbon distribution and accumulation regularity.By using the method,it is found out that different sandbody distributions from various sources and the development of chair-like faults are the two dominant controlling factors for the deep hydrocarbon accumulation in Wangji Oilfield,it provides scientific guidance for rolling exploration and development and it achieves remarkable effect.
引文
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[3]张永华.三维地震资料综合解释方法探讨[J].石油物探,2004,43(1):49～53.
[4]王振升,丁一萍,王照华,等.利用三维可视化技术解释复杂断裂构造[J].石油地球物理勘探,2008,19(6):845～847.
[5]Brown A R,Edwards G S,Howard R E.Fault slicing:A new approach to the interpretation of fault detail[J].Geophysics,1987,52(10):1319～1327.
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