摘要
油田开发中后期优势通道的普遍发育将导致大量注入水无效循环，从而影响采收率的进一步提高。如何有效地对优势通道进行描述是中高含水期油藏开发中亟需解决的重要问题。为此，提出了采用井间动态连通性模型对优势通道进行定量描述的方法。陔方法利用阻容模型反演得到的井问动态连通性系数将通过优势通道无效循环的水量劈分到各注采方向上，并结合油藏工程方法定量计算出优势通道的参数，此外还考虑了优势通道发育级别较高时可能出现的非达西渗流特征。将该方法应用于胜利油田孤东七区西Ng63＋4开发单元，描述结果与数值模拟结果基本一致，验证了方法的有效性。该方法无需额外的测试数据，方便快速、可操作性强，具有较强的矿场应用价值。
At the medium-late stage of an oilfield development, generally well-developed predominant channels will result in inefficient circulation of a large amount of the injected water, and moreover the further enhanced oil recovery will be influenced too. Thus how to characterize the channels is very imperative for the development of the oil reservoirs at medium-high watercut stages. Therefore an approach to describe the channels is proposed with the help of dynamic interwell connectivity model. Using the dynamic interwell connectivity coefficient inversed from ca- pacitance-resistive model, the inefficiently-circulated water amount is divided into each injection-production direc- tion, and meanwhile integrating with oil reservoir engineering method, the parameters of the predominant channels are quantitatively figured out. Moreover, the probably occurred no-Darcy flow characteristics are taken into consid- eration when the grades of the developed preferential channels are rather higher. This approach has been applied in Development Unit Ng63 ＋4 of Gudong West Block 7 in Shengli Oilfield, and the characterized results are in good a- greement with those of the numerical simulation, so the effectiveness of the method is well verified. With the advan- tage of no need for excessive testing data, this approach is convenient, fast well-operated and of much higher field application value.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2013年第6期81-85,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
中石化科技攻关项目“中高渗透水驱油藏整体深部调驱技术研究”(P10072)
关键词
优势通道
井间动态连通性
阻容模型
非达西渗流
定量描述
predominant/preferential channel
dynamic interwell connectivity
capacitance-resistance/resistance capacity （R-C） model
non-Darcy flow
quantitative characterization
