复杂断块水平井CO吞吐选井评判方法研究

The Evaluation Method for Selection of Horizontal Well for CO Huff and Puff in Complex Fault Block Reservoirs

毕永斌 张梅 刘振林 马桂芝 房梦斋

BI Yongbin ZHANG Mei LIU Zhenlin MA Guizhi FANG Mengzhai

中国石油冀东油田勘探开发研究院, 河北唐山 063004

Exploration & Development Research Institute, PetroChina Jidong Oilfield Company, Tangshan Hebei 063004, China

南堡陆地浅层属渤海湾凹陷盆地典型的复杂小断块油田,是国内采用水平井开发油藏的典型代表之一,随着水平井开发的逐步深入,目前大部分水平井处于高含水及特高含水阶段。近两年通过在水平井上开展CO2吞吐的控水增油措施,取得了显著的增油效果。通过分析已实施井效果,收集现场CO2吞吐施工评价因素,运用统计学的原理统计出单因素取值变化对吞吐成功的可能性,应用模糊评判方法,建立了适合复杂断块水平井CO2吞吐选井潜力评价方法,为今后同类型油藏水平井CO2吞吐选井研究提供了依据,对进一步提高水平井开发效果具有借鉴意义。

Nanpu terrestrial shallow layer is a complex small-fault-block reservoirs in the fault basin of Bohai Bay, being one of the typical reservoir developed with horizontal wells. With the advance of horizontal well development technology, most of the reservoirs developed with horizontal wells are at high water cut and extra-high water cut stage. Through CO2 huff and puff in horizontal well, remarkable effect has been obtained in increasing oil production in the past two years. In this article, the stimulation results through CO2 huff and puff in horizontal well has been analyzed, the influencing factors on CO2 huff and puff have been evaluated using the statistics principles by taking different single factor values. Through application of fuzzy evaluation method, the potential evaluation method for selection of horizontal well for CO2 huff and puff in complex fault block has been developed, which provide an important guidance in selection of horizontal well for CO2 huff and puff in similar type of reservoirs, and is significant for improveing the oil-field developemt effect with horizontal well.

中国石油天然气股份有限公司重大科技项目"高含水油田提高采收率关键技术"(2008B-08)。

https://doi.org/10.3969/j.issn.1008-2336.2013.01.064