泥质薄夹层不同参数对油砂SAGD开发效果的影响  

Effects of Different Parameters in Thin Muddy Interlayer on SAGD Production in Oil Sands

作　　者：孔令晓 齐梅[1] 张帅超 刘鹏程[2] KONG Lingxiao;QI Mei;ZHANG Shuaichao;LIU Pengcheng(Research Institute of Petroleum Exploration and Development,CNPC,Beijing100083,China;School of Energy Resources,China University of Geosciences,Beijing100083,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国地质大学(北京)能源学院,北京100083

出　　处：《现代地质》2018年第3期537-546,共10页Geoscience

基　　金：国家自然科学基金项目"潮控河口湾油砂储层构型及盖层完整性评价研究"(41472119);国家科技重大专项"全球油气资源评价与选区选带研究"(2016ZX05029-003);国家科技重大专项"稠油;碳酸盐岩和致密油藏开发主体技术与应用潜力"(2016ZX05016-006)

摘　　要：泥质夹层对油砂SAGD的开发效果具有一定影响。以加拿大麦凯河某区块为研究对象,利用数值模拟手段,对位于注入井上方和注采井间的泥质薄夹层进行表征,模拟对比了泥质薄夹层的位置、延展长度、渗透率、厚度以及条数对SAGD开发效果的影响,得到了油砂SAGD开发的泥质薄夹层的临界参数。研究表明,泥质薄夹层位于注入井上方时对SAGD开发效果影响较小,位于注采井间时有不利影响,且越靠近生产井,蒸汽腔发育越晚,累产油量越低。注采井间泥质薄夹层超过7条、延展长度超过20 m时蒸汽腔几乎不发育,而渗透率与厚度对SAGD开发效果影响不明显。因此油砂SAGD布井时注采井间应尽量避开泥质薄夹层,从而有效降低泥质薄夹层对SAGD的影响。该研究结果,对于指导油砂SAGD部署、规避地质风险、实现SAGD高效开发具有重要指导意义。Thin muddy interlayers are widely developed in Mackay River oil sands. The centimeter-scale interlayers have a great impact on the steam assisted gravity drainage（ SAGD） performance. Based on the actual parameters in the Mackay River oil sands block,a numerical simulation model with the thin muddy interlayers located between or above injector-producer was established,and the thin muddy interlayers with different locations,length,permeability,thickness and numbers were simulated to investigate their impacts on the SAGD performance,and the threshold parameters were obtained. The results show that the thin muddy interlayers above the injector have minor impact on the SAGD performance,while those located between the injector-producer have significant adverse impacts. The closer the thin muddy interlayers from to the producer,the laterwould the steam chamber develop,and the lower is the cumulative oil production. When the length of thin muddy interlayer exceeds 20 meters and the number of thin muddy interlayer exceeds seven,the steam chamber can hardly be developed,and the permeability and thickness have little impact on the SAGD performance. Therefore,SAGD deployment should avoid the thin muddy interlayers between injector-producers. The findings have substantial guiding significance in conducting SAGD development planning in minimizing geology risks and improving SAGD efficiency.

关 键 词：泥质薄夹层 油砂 蒸汽辅助重力泄油 蒸汽腔 热力采油 

分 类 号：TE345[石油与天然气工程—油气田开发工程]