Research method for the optimal pattern of horizontal well deployment in fluvial reservoirs in integrated old oilfields

Abstract

The present invention provides a method for researching the deployment mode of horizontal wells in fluvial reservoirs in integrated old oilfields. The method includes the following steps: Step 1. According to the sedimentary characteristics of fluvial reservoirs, respectively establish distinguishing river reservoirs and meandering flow The fine three-dimensional geological model of the river reservoir; step 2, establish the numerical simulation model of the discriminative river reservoir and the meandering river reservoir, and determine the remaining oil distribution pattern according to the established numerical simulation model; step 3, determine the economic limit of horizontal well exploitation; Step 4, design the configuration mode of horizontal wells and well patterns, and set injection-production parameters; Step 5, carry out scheme design and scheme optimization, and determine the horizontal well deployment mode for different sedimentary reservoirs and different well pattern forms. The research method of horizontal well deployment mode in fluvial reservoirs in the integrated old oilfield is highly targeted and has good practicability. It can effectively improve the unit recovery of thick oil layers in the integrated old oilfield and greatly increase the cumulative oil production of the old oilfield. quantity.

Description

technical field [0001] The invention relates to the application field of horizontal wells in the late period of ultra-high water cut in medium-high permeability monolithic oil reservoirs, and in particular to a research method for the best mode of deployment of horizontal wells in fluvial facies reservoirs in monolithic old oilfields. Background technique [0002] Since the 1980s, horizontal wells have been promoted and applied on a large scale in foreign countries. Since the "Tenth Five-Year Plan", in response to the challenges and opportunities brought by new types of reservoirs and new application fields, Shengli Oilfield has vigorously tackled new technologies for horizontal wells. Further research and development of horizontal well geological modeling and remaining oil quantitative description technology, horizontal well integrated optimization design technology, horizontal well drilling trajectory measurement and control technology, horizontal well oil layer protection ...

AI Technical Summary

Problems solved by technology

Since 1996, Shengli Oilfield has used horizontal well technology to tap the remaining oil-enriched area at the top of the positive rhythmic thick oil layer, and achieved good results. The old oilfield is in the development stage of ultra-high water cut, with high comprehensive water cut, complex distribution of underground oil and water, and difficult adjustment The difficulty of horizontal well design is also increasing, and the original horizontal well design technology cannot meet the current oilfield development needs

The original horizontal well achieved good results in the early stage of tapping the remaining oil, but due to the lack of a good configuration relationship with the original injection-production well pattern, problems such as insufficient liquid supply and rapid rise of water cut occurred later, which affected the development effect of the horizontal well

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