边水断块油藏蒸汽吞吐开发效果分析

边水小断块稠油藏蒸汽吞吐的效果受多因素的影响,产出水性质的识别对分析小断块边水活跃程度、储量动用状况等尤为重要.作者以新庄油田57 断块稠油开发为侧,在对注蒸汽吞吐开发过程中油层物理和流体变化规律分析的基础上提出了产边水识别的综合判断方法,用周期内生产井的综合含水变化特点、周期产水量/注蒸汽量比值,以及对比累积产水量与累积注蒸汽量等多参数综合分析,将生产井进行科学分类.在此基础上,进一步分别分析产边水井、正常生产井的开发特点及影响因素,提出了生产井到油水边界的合理距离和边部生产井的工作制度,从而避免生产井多周期低效生产,对提高该类油藏的开发效果有重要的意义.

Analysis of the efficiency of huff and puff in the reservoir of edge water invasion and fault block

To develop the heavy oil reservoir of edge water invasion arid complex small fault block is very difficult and affected by many factors during huff and puff. Identification of water property redounds to analyse the activity of edge water, the degree of reserves emploment and the upper production measure. It is important to improve the development efficiency by analysing the developing characteristics and effective factors. The production of 57 Fault Block is taken as an example to analyse the developing complexitily and difficulty in the Xinzhuang oilfield. Based on the analysis of the oil reservoir physics and the flooded characters in huff and puff well hole bottom region, a synthesis judgement method is put forwared to judge the edge water invasion. The producing wells are classified by using the character of water cut change in a huff and puff, the ratio of the water production to the injected steam output in a period, and by comparing the accumulated water production with that of the injected steam output. At last, the characteristics of producing edge water wells and normal producing wells are summed up to discuss and analyse the developing efficiency, the appropriate distance between the producing well and the oil-water boundary is adviced, and the working system of the producing wells located on the border is suggested.