海上强底水油藏高含水期产液结构调整

ADJUSTMENT OF LIQUID PRODUCTION STRUCTURE IN OFFSHORE STRONG BOTTOM WATER RESERVOIR AT HIGH WATER CUT STAGE

A油田为海上强底水油藏,由于海上开发开采的特殊性,油田一直保持高速开发,强底水油藏具有含水上升特别快的特点,目前含水率高达96%,高含水阶段一般为提液增油从而达到高产量,而受海上条件限制,油田液的处理能力已达到极限。为了达到增油稳产的目的,需要对单井的产液量进行调整。如何在油田整体液量不变的情况下,合理分配单井产液量从而增加产油量,就成为了一个课题。通过油藏工程和渗流力学方法结合现场工艺,分析单井的最大产液能力,合理生产制度,关井压锥效果等,制定了全油田单井产液结构调整策略。在全油田液量不变的情况下增油稳产,为油田遇到液处理能力瓶颈时,提供借鉴和指导。

The oilfield A is a strong bottom water of offshore reservoir. Because of the particularity, the oilfield has been developing at a high speed. The strong bottom water reservoir has the characteristics of water cut rising especially fast. At present,the water cut is as high as 96%. In the high water cut stage,the oil production is generally increased by liquid extraction, and the processing capacity of oilfield fluid is limited by the conditions. In order to achieve the goal of increasing oil production, it is necessary to adjust the production volume of every well.How to reasonably distribute the liquid production of every well to increase the oil production under the condition that the overall fluid volume of the oilfield remains unchanged has become a topic. Based on reservoir engineering and percolation mechanics combined with field technology, this paper analyzes the maximum liquid production capacity of every well, reasonable production system, coning effect of shut-in and so on, and formulates the adjustment strategy of single well liquid production structure in the whole oilfield. Increasing oil production and stabilizing production under the condition of unchanged liquid volume in the whole oilfield can provide reference and guidance for oil field when it encounters bottleneck of liquid treatment capacity.