The Technical Policy Of Water Development For Chang4+5Formation Of Werstern Nanliang Ansai Oil Field

This study focuses on the waterflodding potential on the rhombus-shaped Fanjiudian well network and the rectangular well network established in2009of the Chang4+5reservoir in Western Tian Nanliang, Ansai Oilfield. On the basis of well network adaptability evaluation, injection timing, injection parameters, and reservoir water flooding measures, together with the three major laws and waterflood development features of the system, we herein put forward a set of scientific and reasonable for Ansai oilfield fractured reservoir water injection technology developed system.Progresses of this study is summarized as the following:(1) A combination of static identification and dynamic recognition of injection and crack research methods that would be an innovation on dynamic identification of cracks standard in the western Nanliang area of the Ansai oilfield;(2) an systematic evaluation is made—on the well see water effective, pressure changes, oil production rate changes and the law of diminishing capacity—to analyze and evaluate different well network. Combined with the results of numerical simulation optimization, suitable well networks in the Chang4+5reservoir of the western Nanliang area are selected out;(3) A combination of methods and dynamic analysis, including the injection timing, injection parameters and injection wells measures argumentation analysis, reasonable policy for the block and to develop specific measures are applied on45wells.This investigation would provide theoretical guidance for the Chang4+5reservoir production and the well network deployment as well as injection policy formulation. Furthermore, this would lead to the establishment of reasonable and effective measures on the current problems and, at the same time, also provide a reference for similar reservoirs.