大尺度缝洞型碳酸盐岩油藏含水率变化规律  

Variation rule of water cut in large-scale fractured-cavernons reservoir

作　　者：常宝华[1] 熊伟[1,2] 高树生[1,2] 丁鲲 张静楠[1] 

机构地区：[1]中国科学院渗流流体力学研究所,河北廊坊065007 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [3]中国石油工程设计有限责任公司青海分公司,甘肃敦煌736202

出　　处：《油气地质与采收率》2011年第2期80-82,86,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家重点基础研究发展计划"973"项目"碳酸盐岩缝洞型油藏开发基础研究"(2006CB202404);国家自然科学基金"缝洞型碳酸盐岩油藏溶洞参数识别方法研究"(51074176)

摘　　要：大尺度缝洞型碳酸盐岩油藏储集空间组合形式多样、油水关系复杂,储层认识较为困难,且不同的缝洞组合模式具有不同的含水率变化特征;针对洞边裂缝组合模式和多洞多缝组合模式,以弹性理论为基础,通过计算分析油水界面变化与裂缝的关系,研究了对应油井的含水率变化规律。结果表明,2种缝洞组合模式的单井含水率曲线都呈台阶状变化,对于洞边裂缝组合模式,洞边与井沟通的裂缝条数直接影响油井含水率曲线台阶的个数;对于多洞多缝的组合模式,油水界面淹过溶洞个数直接影响油井含水率曲线台阶的个数。含水率曲线台阶的高度、长度及无水采油期的长短均与缝洞模式有关,针对矿场实际生产中的曲线进行了简单分析。结合地震及试井资料可综合判别地下缝洞组合模式及属性参数,对油田矿场认识储层具有一定的指导意义。Large-scale fractured-cavernous reservoirs are complex due to the diversified storage space, oil-water relations, as well as the fracture and cave combination mode. Based on the fracture and cave combination mode and the multiple fracture and cave mode, as well as the elastic theory, the relationship between variation of water oil contact and fracture is analyzed and calculated so as to study the variation rule of water cut of corresponding well. The results show that: single well water content curves are shown in 'step-like' form for the two fractured-cavernous mode: the caves around the cracks in the joints with high angle hole pattern, hole side combination mode will directly affect the number of 'step' in the water content curve; and for the multiple hole and fracture combination model, the oil-water interface swamp caves will directly affect the number of 'step' in the water content curves. The height, length and duration of no-water oil production are all related with the fracture model, and it can be inferred and analyzed from the field production curve. Therefore, seismic and well test data can be integrated to determine the combination fracture and cave combination as well as property parameters of the reservoir, and it is of certain significance for the understanding of carbonate reservoir.

关 键 词：缝洞型油藏 含水率 大尺度溶洞 台阶状变化 缝洞组合模式 

分 类 号：TE34[石油与天然气工程—油气田开发工程]