气顶边水油藏水平井注水可行性研究

JZ油田沙河街组为高倾角构造层状油气藏，属于辫状三角洲前缘沉积，具有储层砂体厚度小，横向变化大的特点。油田顶部存在气顶，底部具有边底水，目前采用水平井平面穿透多个砂体分油组衰竭开发，适当时期转为注水开发。如何注水开发是油田开发面临选择的问题。利用油藏数值模拟对JZ油田6井区Ⅲ油组的注水井井型、注水井平面位置、注水井纵向位置对水平油井在不同的纵向位置水驱效果对比分析，优选出适应本油田高效开发的水平井注水开发模式。

Feasibility study of water in reservoir with gas injection of horizontal wells cap and bottom water

Shahejie formation of JZ Oilfield is high- inclination layer reservoir with gas cap,which belongs to the bian shape delta front deposition reservoir having small thickness sand body and sand body level changes. The reservoir is be- tween bottom water and gas cap . Now the oilfield is depleted by adopting horizontal wells penetrating multiple sand bodies. The timing of converting to water flooding and how to carry out water flooding is an important subject that oilfield development faces. For III formation of 6 regions in the oilfield, reservoir numerical simulation was used to study the type and plane location of water injection wells, the water flooding effect of different vertical position of injection wells, and se- lecting out the optimal way for high efficiency development of the oilfield horizontal well water flooding.