缝洞型碳酸盐岩油藏“二次定量雕刻”技术及其应用  

“Second quantitative characterization”and its application on fracture-cavity carbonate reservoirs

作　　者：李勇[1] 邓晓娟[1] 宁超众 王琦[1] 崔仕提[2] 张琪[1] 万效国[2] LI Yong;DENG Xiaojuan;NING Chaozhong;WANG Qi;CUI Shiti;ZHANG Qi;WAN Xiaoguo(PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;Tarim Research Institute of Petroleum Exploration&Development,Korla 841000,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油塔里木油田勘探开发研究院,新疆库尔勒841000

出　　处：《石油勘探与开发》2022年第4期693-703,共11页Petroleum Exploration and Development

基　　金：国家自然科学基金面上项目“考虑水侵影响的多尺度缝洞型油藏产量不稳定分析理论研究”(51874346)。

摘　　要：针对塔里木盆地奥陶系缝洞型碳酸盐岩油藏孔洞缝发育、非均质性极强、依靠静态地震资料的一次雕刻结果不确定性大、提升有效储集体定量雕刻精度难的问题,在一次静态雕刻基础上,充分考虑雕刻过程中面临的诸多关键影响因素,动静结合,提出缝洞“二次定量雕刻”技术。该技术结合试井分析、产量不稳定分析、动态储量分析、动态连通性评价等动态分析与研究手段,将动态分析的储集层认识作为统计参数约束地震波阻抗反演、完善波阻抗与孔隙度关系模型,确定缝洞体形态,计算动态储量,进而优选更为准确的缝洞模型,并在二次雕刻结果的基础上动态反推油水界面。本技术可大大降低缝洞体静态一次雕刻的不确定性,提高雕刻结果的精度,并在塔里木盆地缝洞型碳酸盐岩油藏的开发实践中收到了良好的成效。The Ordovician fracture-cavity carbonate reservoirs of Tarim Basin,NW China are featured by developed pores,caves and fractures.The strong heterogeneity results in huge uncertainty when these reservoirs are quantitatively characterized using merely static seismic data.The effective quantitative characterization of the reservoirs has been an urgent problem to be solved.This study creatively proposes the"second quantitative characterization"technique with the combination of dynamic and static data based on the primary static quantitative characterization and fully considering lots of key influence factors when conducting characterization.In this technique,dynamic analysis methods such as well testing,production rate transient analysis,dynamic reserve evaluation and dynamic connectivity evaluation are used to get understandings on this kind of reservoir.These understandings are used as statistical parameters to constrain the inversion of seismic wave impedance to improve the relationship between wave impedance and porosity and determine the fracture-cavity morphology,calculate dynamic reserves,and then a more accurate fracture-cavity model can be selected and used to calculate the oil-water contact inversely based on the results of"second quantitative characterization".This method can lower the uncertainties in the primary quantitative characterization of fracture-cavity reservoirs,enhance the accuracy of characterization results significantly,and has achieved good application results in the fracture-cavity carbonate reservoirs of Tarim Basin.

关 键 词：塔里木盆地 奥陶系 碳酸盐岩 缝洞型油藏 不确定性 静态雕刻 动态分析 动静结合 二次定量雕刻 

分 类 号：TE122.2[石油与天然气工程—油气勘探]