The Study Of The Second Development Of Common Heavy Oil Reservoir In The Xinhai27 Block

Xinhai 27 is a typical heavy oil reservoir of thick layer an edge-bottom water, In the use of vertical wells after the development of 13 has entered the latter part of the development of high moisture content, in view of present situation about serious flooding of well, low production, the larger difficult in development and adjustment, In order to fundamentally improve reservoir development results and achieving sustainable development of the reservoir, This study is on base of fine geologic research, Application of new technology re-development of old oil fields, The innovative proposal to improve the effect of the old oil field development and enhance oil recovery oil field consisting mainly of old oil fields redevelopment,Establish technical standards of redevelopment,Research in the comprehensive use of logging, logging, testing, reservoir engineering, and other effective technologies, Innovative ideas, Actively explore, Understand redevelopment potential, Fine research on distribution of remaining oil, Fully demonstrated the rightful development mode and producing mode,Optimize the deployment of redevelopment programmes, Determine the development method of redevelopment is that two layers, the overall use of horizontal wells alternative vertical wells, the development of thermal recovery in Xinhai 27. Research made three breakthroughs in Reservoir understanding, Application of new technologies, network deployment Well, Implementation of four changes about Mining methods from a single cold production to the development of pluralism, Development results from low speed to high speed efficient inefficient, Development indicators by the calibration can not effectively enhanced oil recovery to Recovery, The deployment of adjustment programmes by sporadic small-scale deployment, Formed a unique redevelopment of supporting technologies, Reservoir for the same type of results provided to improve the development of successful experience.The results of the implementation of the scene notable results, The deployment of the programme 32 horizontal wells, have all been put into use, Block development indicators have improved, daily oil production from 32 t / d increased to 343 t / d, with a peak output of balanced development, Production rate rose to 0.26 percent from 2.78 percent, the Composite aquifer dropped by 93.6 percent to 84.7 percent, stage of the cumulative oil production by Horizontal is 10.9×104t, Recovery ratio of redevelopment is expected to be enhanced 15.0%, compared with a doubling development. At the same time, the use of horizontal wells to achieve a reservoir rolling Extensions, increasing geological reserves 221×104t.