Study On Development Potential And Development Countermeasure Of Carboniferous Gas Reservoir In Bajiao Farm In Northeast

Bajiao gas field geological survey began in1957, is a small gas reservoir for the region distribution, which belongs to stratum-structure composite traps, with the characteristics of burial depth, low porosity, low permeability and strong heterogeneity. Through a new research of the gas pool description, the reserves obviously increased than the early research. But now the gas pool production declined rapidly, and without new high quality reserves, Therefore, the most important is to extend the stable production period and to enhance recovery.Based on the geology data, static and dynamic data of Bajiao gas field, this paper analyzed the geological and behavioral characteristics combined with numerical simulation method. In order to develop the gas reservoir by a scientific and efficient way, a new development program has been put forward, which can help to keep production stable and sustainable, and provide reference for similar gas reservoir development.In this paper, the main work and the conclusions are as follows:(1) Described the geological characteristics of Bajiao field. Studied the structure characteristics, reservoir characteristics, sedimentary characteristics, fluid distribution and reservoir classification evaluation of this field, to provide the detailed geological data for later study.(2) Studied the dynamic characteristics of this field. The gas field is given priority to develop the horizontal wells, With the characteristics of strong heterogeneity, and the production of gas wells are quite different, gas reservoirs with edge water, which is not active. Under the high allocation the production declined rapidly, In production the stable production is very low, or even no stable production stage. Volumetric method to calculate the static reserves is42.23×108m3, recovery ratio is4.89%. Dynamic reserves is10.15×108m3, produced reserves is20.35%. Obviously the gas reservoir has great potential.(3) According to the geological modeling data, static and dynamic data of the gas reservoir, this paper establish a numerical model by matching history production. The rest mount of the movable reserves is36.084×108m3in Bajiao field, recovery ratio is only5.42%, so Bajiao field has great exploration potential.(4) According to the characters of dynamic analysis and numerical simulation results, this paper put forward some adjustment programs. According to current situation of development in the study area, the author suggest to drill a horizontal well in Bajiao field, and analyze the potential reserves of each block, to adjust the development plan, and puts forward a optimal technical countermeasures to develop the gas field, and analyze the effect of the development.