超稠油油藏转小井距蒸汽驱条件及时机  

The study on switching to steamflooding conditions and opportunity from steam stimulation in super heavy oil reservoirs

作　　者：李彦平[1] 张平[2] 揣金海[3] 李华[2] 孙鹏[1] 

机构地区：[1]河南石油勘探开发研究院,河南南阳473132 [2]河南油田第2采油厂,河南唐河473400 [3]河南油田西部勘探公司,新疆焉鳍841100

出　　处：《西北地质》2003年第4期74-78,共5页Northwestern Geology

基　　金：中国石化总公司"十五"科技工程项目:薄层稠油提高采收率技术研究专题:"浅薄层稠油油藏蒸汽区开采技术研究"的子课题"蒸汽区条件;时机及助采参数优选研究"(编号:T00006-3-1)。

摘　　要：蒸汽驱是稠油油藏经过蒸汽吞吐开采后进一步提高原油采收率的主要热采阶段。但不是说任何时候转驱都可取得较好的效果。笔者系统研究了影响蒸汽驱开采效果的因素:原油粘度、油层有效厚度、纯总厚度比、起始含油饱和度和油层非均质性等,确定出适宜蒸汽驱开采的油藏条件。在分析稠油油藏加密吞吐后油藏条件变化的基础上,利用油藏工程数值模拟技术研究确定出超稠油油藏转小井距蒸汽驱的合理时机。Steamflooding is the main important stage in the thermal recovery of heavy oil reservoir, which can further enhance the recovery of heavy oil. But it does not mean any time might be reasonable to switch to steamflooding from stimulation. The author thoroughly studied those reservoir factors which impact the effect of steamflooding after comprehensively analyzing the main geologic features of super heavy oil reservoir in Henan oilfield. These reservoir condition for steamflooding are the net pay thickness of the oil formation, the ratio of net to gross thickness, the remaining oil saturation,the heterogeneity of oil formation and so on. On the basis of analyzing the changes of the reservoir condition after huff and puff in fillers , studied and confirmed the reasonable opportunity to switch to steamflooding from huff and puff with reservoir engeering methods and numerical simulation technology.

关 键 词：超稠油 蒸汽驱 油藏条件 小井距 含油饱和度 油层非均质性 数值模拟 

分 类 号：P618.13[天文地球—矿床学]