Fracturing Effect Evaluation and Influencing Factors Analysis of Bohai Offshore Low Permeability Oilfield

摘要

Fracturing development is an important technical means for the development of low permeability reservoirs.Successful experiences and technical systems have been achieved in the development of conventional low permeability reservoirs,tight reservoirs,shale gas and coal bed gas on land.However,offshore oil and gas field development has the characteristics of special environment,large investment,high cost and high risk.Generally,few wells and high production are adopted,which poses a great challenge to the refractory low permeability reserves in terms of development characteristics and economy.Taking a low permeability reservoir development by fracturing in Bohai offshore oilfield as an example,the article analyze the fracturing scales,evaluate the effect of fracturing,classify wells by effect and find the main factors affecting offshore fracturing development effect based on grey correlation method.This study provides an evaluation method for fracturing development of offshore low permeability oilfields and a basis for well selection and formation selection of fracturing wells.