Low Permeability Reservoir In Guangli Area Reservoir Remaining Oil Distribution And Adjustment Plan

In the needle in Guangli Oilfield low permeability reservoir oil-bearing formation in central,Sha four section,reservoir depth of 2500-2730 m,oil-bearing area 4.0km2,the existing well pattern recovery 41.8%. Guangli oilfield is located in the central uplift belt of Dongying sag East,is a five level three large fault controlled the whole structure of reservoir. Low permeability reservoir conditions on the ground are complex,surrounded by Jinhu,the Milky Way logistics park planning area,wetland. At present,the problems facing is:area reservoir recovery degree is not high,production rate and low pressure wells,water injection and production wells with high,lack of capacity. These problems seriously affect the efficient development of oil fields. In this paper,the geological characteristics of the reservoir,reservoir in guangli area flow characteristic and dynamic characteristic of the actual development,the use of the method and theory of reservoir geology,reservoir engineering and deeply analyzes the reasons affecting the results of water flooding development,demonstrates the adaptability of development layer series,well pattern,well spacing,carry out the key factors affecting development result of reservoirs of water injection in Liaohe area from the start,proposal distribution characteristics in low permeability reservoir percolation characteristic and reservoir sand body,perfect injection production relationship for the purpose of effective connectivity,to establish reservoir,properly reduce the injection production well spacing,so as to realize the expansion of the flow area,improvement of control degree of water flooding effect. On the basis of the above research,the distribution of remaining oil in guangli area reservoir prediction analysis,the current remaining oil enrichment area mainly concentrated control degree is low,the injection production relationship is not perfect,and not into the waves and the fault barrier regions in the well network,the distribution is more fragmented. According to the characteristics of different distribution of remaining oil in guangli area reservoir,combining the reservoir sand body and the original well network distribution, respectively study on network optimization in specific adjustment wells,well location selection,and put forward comprehensive consideration of adjustment well drilling oil saturation in effective thickness,location and the relationship of injection production “three consider“ principle,to ensure that the the targeted well pattern adjustment scheme. In order to solve the main problems in the development of the reservoir in guangli area,improve development effect,enhancing oil recovery,the study on the theory of oil and gas reservoir development as the guidance,reservoir modeling technique using deterministic modeling and stochastic modeling combined,using quality control and mesh coarsening,application of computer means the maximum limit,oil and gas hiding internal fine structure anatomy,reveal the distribution rule of hydrocarbon,reservoir fine structure rock physics model can describe the establishment of geological oil and gas distribution and flow characteristics,and Cheng Yan,and flowing and engineering. Comprehensive study of reservoir engineering from the well network,layer system adaptability,development mode and process adaptability,refine understanding of structure and reservoir,effectively solve the problem in exploitation for many years because of conflicts between layers leads to increased water cut rising speed and other outstanding problems. A numerical simulation is conducted based on the sedimentary microfacies and reservoir of understanding,analysis of the main controlling factors of remaining oil distribution,find the recoverable reserves of planar distribution rules,and then the comprehensive evaluation of development result,edge expansion deploy productivity well expand reserves zone. At the same time to carry out single sand layer of reasonable well spacing density and comprehensive evaluation productivity research,comprehensive adjustment plan for the new combination of old wells,and provide scientific basis for improving the comprehensive governance,reservoir of guangli area ultimate recovery.