The Analysis On Technical Policy Of Artificial Edge Water Flooding In The Ridge Fault Block Reservoir

The S block reservoir is a banding narrow ridge reservoir.It is a water flooding oil reservoir with high porosity and high-permeability,which is controled by structure.When this kind of fault block oil reservoir enters into high water cut stage,the gradually decrease of annual output has a high impact on the continous and stable production of the oil field.In this thesis,according to characteristics of the oil reservoir,the characteristics of complex oil-water relationship and remaining oil distribution are unclear traits.This thesis uses development of dynamic analysis,geological modeling and numerical simulation methods to study on distribution and migration pattern of remaining oil,mainly takes the roof fault block as the key point,to explore the technical policy boundary of the artificial edge water flooding in the roof fault block reservoir.The article mainly achieves the following aspects of the results and awareness:The control factors of high water content in S oil reservoir well mainly including,the influence of high part along the fault water channeling and edge water inflow,and the influence of pipe outside flow and plane heterogeneity.The main influencing factors of the remaining oil distribution in the S reservoir include the gravity differentiation effect caused by the structural level,the imperfect the well pattern,the hydrodynamic retention zone formed by the fault occlusion,and the development process.The retention area on the main stream,the interlayer interference,and the reservoir plane discontinuity or the barrier to form the remaining oil.According to the changing trend of the dynamic liquid level,the bottom hole pressure,the injection production ratio and the development of interlayer,it is considered that there is a large energy and slow releasing energy body along the northern fault.The optimization of the injection and production parameters of the S reservoir is carried out to determine the technical policy boundary of the artificial side water flooding:the well pattern optimization:the triangular well pattern.Well spacing optimization:when the oil band width is less than 150m,the 550m well spacing is the best,when the oil band width is greater than 150m,400m well spacing is optimal;Water injection method optimization:when the oil band is narrow,the well is arranged in the waist of the oil area oil production,with the increase in the width of the oil band,the wells in the oil outside the border favorable.Injection and production ratio optimization:the future injection ratio of the block is not less than 1.25.Extraction volume optimization:the amount of liquid in a narrow strip of single well reaches about 156m~3/d,it works best.When the amount of narrow strip single-well fluid reaches around 156~235m~3/d,it works best.