Development and adjustment method for multi-layer sandstone oil reservoir with developed scattered sand bodies

Abstract

The invention provides a development and adjustment method for a multi-layer sandstone oil reservoir with developed scattered sand bodies. The development and adjustment method comprises the followingsteps that 1, fine reservoir geological research and geological modeling are carried out; 2, a numerical model is established; 3, the numerical model is combined with an oil reservoir engineering method to study the distribution of remaining oil; 4, a multi-round series of strata alternating feasibility study is carried out; 5, the series of strata alternating resource is evaluated; 6, a multi-round series of strata alternating scheme is designed; and 7, index prediction and economic evaluation are carried out, and the scheme is implemented. The development and adjustment method for the multi-layer sandstone oil reservoir with the developed scattered sand bodies has good practicability for improving the reserve control degree and oil recovery speed in the late stage of ultra-high water cut of the multi-layer oil reservoir, under the condition of low oil price, the recovery ratio of the multi-layer reservoir in the late stage of the ultra-high water cut can be economically and effectively improved, and the development and adjustment method provides support for stable production and production increase in old oil fields.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for adjusting the development of multi-layer sandstone reservoirs with scattered sand bodies. Background technique [0002] In the process of oilfield development, multi-layer sandstone reservoirs with scattered sand bodies have poor vertical superposition, poor well pattern perfection, and low degree of reserve control, resulting in long-term fixed historical streamlines and high water consumption zones in some areas , Ineffective water circulation intensifies, leading to serious water flooding of oil layers, high water cut in oil wells, poor adjustment effect of conventional operations, and it is difficult to enhance oil recovery under current well pattern conditions. Due to the poor integrity of the existing well pattern and the large difference in remaining oil saturation, there are remaining oil enrichment areas at the edge of the sand body and the top ...

AI Technical Summary

Problems solved by technology

However, under the current low oil price conditions, it is no longer economically feasible to improve and adjust the overall well pattern based on the investment in new wells and supporting surface reconstruction; the upper and lower systems are planning to upgrade the ineffective wells or ultra-high water-cut wells to more profitable ones. Potential area is an inevitable choice to improve well pattern and improve development efficiency under low oil price

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