The Main Completion String Of Horizontal Well Segregated Fracturing

Horizontal wells chained together by connecting the various components of the body is fracturing oil wells layer string methods to enhance effective protection against low permeability reservoir capacity development and transformation is essential. Fracturing and completion process scientific and rational allocation string parts can be achieved in a relatively short time frame to complete the construction work unify the different layers of wells completed reservoir confluence gathering. Horizontal section is an important component parts of the process of fracturing horizontal wells study of staged fracturing process uses the minimum required to achieve the destruction of the value of the limit point of the oil segment. Beginning in the late 1990s, at home and abroad staged fracturing of horizontal wells include the following types:hierarchical coiled tubing fracturing, horizontal wells openhole staged fracturing (including acid fracturing) technology, water pressure jet technology. For low permeability reservoir development, the horizontal well pressure value of its natural production is poor, cut screen completion occupies a large way than the column, the majority of long-distance deep reservoir of Dan. study its staged fracturing efficacy expectations far, so output deviation of horizontal wells after production has become increasingly prominent mining problems, and failed to complete the scientific value of the economic benefits expected. Uneven distribution of pressure and the formation rock and Dan became long distance limit the production of low permeability horizontal wells open implementation of the major constraints to deploy. Therefore, the horizontal well fracturing string of R & D equipped highlights a very important transformation value.This paper introduces the analysis of a variety of practices related to the domestic and international level fracturing completion method, then use the reference which way, shape final study design finished loading the main column string parts:pre-production work on the use of spiral shaper Reservoir Road Trail naked eye wall trim values reached fracturing completion string column under the condition part, immediately put on the use of components with serial production design construction technology column, the decentralization of the tail after cleaning cycle start pressurization controls, to the suspension of barrier and completed openhole packer unit barrier for the first time, refer to the suspension of operations specifications to achieve device lost hands, lifting the suspension upper unit as a whole tubing; put a butt fracturing pipe to pipe joints connecting the top of the suspension with inner leg parts After started pipe with injection pressure, start at the head of the column series differential pressure sleeve components, to achieve openhole packers second barrier device, run to complete the transformation of primary production fracturing, fracturing production plan based on different path the value of blocking the ball put in transformation; after all the processes to be carried out in different diameter values depend on the pressure seal ball reflux surfaced wellbore, with delivery pipelines converge consolidator based on production output node.This paper studies analyzed the horizontal well fracturing string concatenation segmented design layout structure forms a barrier colloid openhole packer device matching mechanism studies, and conducted in-depth analysis of stereotypes based on structural forms part of the main series, take more field test item components, research has established series packer device, liner hanger device openhole packer unit staged fracturing of horizontal wells main pressure-sleeve, rear wash cycle controls and other components fitted completion column.The study design stereotypes focus is blocking mechanism colloid ratio study. And the ability to shape the overall research series cylinder smooth increase in the reservoir to improve operational performance and reliable mechanical mechanism of the body, the suspension, the indicators sand hole, multi-level bushes and other devices are also required to achieve the expected requirements prepare for the main column protection.