裂缝-孔洞型油藏弹性开采实验  

EXPERIMENT OF ELASTIC PRODUCTION FOR FRACTURED- VUGGY OIL RESERVOIRS

作　　者：熊伟[1,2] 常宝华[3] 潘懋[1] 高树生[2] 安为国[3] 朱鹏飞[4] 

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [3]中国科学院渗流流体力学研究所,河北廊坊065007 [4]中海油能源发展股份有限公司监督监理技术公司,天津塘沽300452

出　　处：《大庆石油地质与开发》2012年第2期116-119,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重点基础研究发展计划项目（2006CB202404）及国家自然科学基金（51074176）联合资助.

摘　　要：裂缝-孔洞型油藏为典型的缝洞型油藏，具有非均质性极强、储集空间类型丰富等特征。通过物理模拟实验对其弹性开采进行分析，采用全直径岩心经过人工处理制作裂缝及孔洞，并进行数学模型的求解及压力特征曲线分析。结果表明：裂缝-孔洞型油藏弹性开采时，单井的累计产量与压降关系曲线前期呈直线，后期存在明显上翘特征，油的黏度不同时，曲线上翘趋势一致；原始压力不同时，前期直线段具有相同的斜率，后期上翘幅度不同；分析双对数坐标下的压力变化曲线可知，流体黏度主要影响压力曲线的中间段弯曲幅度，原始压力主要影响压力曲线的中间段弯曲幅度和后期段高低。由此揭示了该类油藏弹性开采时基质及微裂缝的供给特征，认识了黏度及油藏原始压力的影响。Fractured-vuggy oil reservoir is a typical crack-pore formed oil reservoir characterized by extremely seri- ous heterogeneity, rich types of reservoir accumulation and so on. Through the physical simulating experiments, the elastic production of this kind of oil reservoir is analyzed with the help of manmade fractured-vuggy full-diameter cores, mathematic solution-seeking model and the characteristic curves of the pressures. The results show that dur- ing the elastic production, the relation curve of the cumulative production and cumulative pressure drop is linear in the early period, and then has an obvious upturned segment in the later period. The upturned trends are accordant when the oil viscosities are different; for the different original pressures, the linear segments have the same slope; but in the later period, the upturned degrees are on the contrary; the changed curves of the pressures analyzed by log-log coordinate reflect that the viscosities of the fluids mainly influence the bent degree in the middle section of the pressure curves, the original pressure is the principal influencing factor of the degree and their later perform- ances. Therefore the supply features of the matrix and micro-cracks are revealed when this kind of oil reservoir is e- lastically produced, and furthermore the influences of the viscosities and original reservoir pressure are made clear.

关 键 词：缝洞型油藏 裂缝-孔洞 碳酸盐岩 弹性开采 实验 

分 类 号：TE122.2[石油与天然气工程—油气勘探]