优势通道分布特征研究——以文25东沙二下油藏为例

Study on the distribution characteristics of dominant channel-with the reservoirs of Wen 25 Dong sha Erxia for example

优势通道的形成导致注入水沿优势通道无效循环,影响油田采收率及开发效益的提高。以文25东沙二下油藏为例,在不同时期取芯井储层研究的基础上,选取不同开发阶段具有代表性的典型油水井,通过岩石特征、物性特征、沉积特征等地质因素和吸水剖面、注水强度、见效特征等动态因素分析,动静结合展开储层优势通道的形成机理研究、识别与描述,总结优势通道形成的地质、动态的定性特征和定量参数,对于文25东沙二下油藏三次采油和油田堵水调剖具有较强的指导意义。

The formation of dominant channel leads to the inefficient circulation of injected water along the dominant channel,It is enhanced oil recovery and development benefit. This paper,with the reservoirs in the lower member of Es2 in East Wen25 for example,based on the reservoir study of core well in different periods,we were selected the typical oil and water wells in different development stages. analysising by the geological factors such as rock characteristics,physical characteristics,sedimentary characteristics,and Water absorption profile,water injection intensity,effective characteristics and other dynamic factors,research of the formation mechanism,identification and description of the dominant channel of the reservoir with static and dynamic action,We are summarized the geological and dynamic characteristics by qualitative and quantitative parameters for formationed of dominant channel. It has a strong guiding significance for the tertiary oil recovery and water plugging and profile control in the reservoirs in the lower member of Es2 in East Wen 25.