渤海油田水平井出水规律特征及影响因素

Characteristics of water breakthrough and influence factors of horizontal well in Bohai Oilfield

李进 龚宁 徐刚 张启龙 袁伟伟 徐涛 2

海洋石油高效开发国家重点实验室，天津 300459 中海石油（中国）有限公司天津分公司，天津 300459

State Key Laboratory of Offshore Oil Exploitation, Tianjin 300459, China Tianjin Branch of CNOOC Ltd., Tianjin 300459, China

针对渤海油田水平井高含水问题，以某典型高含水油田为例，统计121口水平生产井，采用单井含水率曲线法进行渤海油田水平井出水规律及关键影响因素研究。结果表明，渤海油田水平井出水规律主要归纳为凸型、直线型、S型和凹型等4种类型，以凸型为主。从影响出水的地质油藏因素、工程因素和开发生产因素出发，采用灰色关联度分析法，深入分析了避水高度、渗透率级差、油水黏度比、采液强度、水平段长度等关键影响因素对出水的重要性等级，同时考虑数据处理方法的影响，明确了不同出水规律类型的主控因素及成因。研究成果可指导新井控水设计，为水平井稳油控水措施的制定提供依据，对进一步提高水平井开发效果意义重大。

Aiming at the problem of high water cut in horizontal wells of Bohai Oilfield, taking one typical high water-cut oilfield as an example, the single well water cut curve method was used to study the regularity and key influencing factors of horizontal wells in Bohai Oilfield by the statistics of 121 horizontal production wells. The results show that the water production law of horizontal wells in Bohai Oilfield can be divided into four types: S type, concave type, convex type and straight type, and convex type is the main type. Based on the factors of geological reservoir, engineering and production, which affect water production, grey relational analysis method was used to analyze the importance degree of key influencing factors such as water avoidance height, permeability ratio, oil-water viscosity ratio, fluid producing intensity and horizontal section length. Considering the influence of data processing methods, the main controlling factors and causes of different types of wells were clarified. The research results can guide the water control design of new wells, and provide basis for the study of stabilizing oil and controlling water in horizontal wells. It has an important significance for further improving the development effect of horizontal wells.

10.6056/dkyqt201901018