Gas Reservoir Evaluation For Suining Formation In Xindu Gas Field In The Early Stage Of Development, Sichuan, China

There are 100×l0⁸m³ of proved GIP in Suining formation gas reservoir of Xindu gas field. The reservoir has the characteristics of tight reservoir, low abundance, discontinuous hydrocarbon content distribution, low productivity and quite different between wells, strong heterogeneity. Because of the defects on the understanding level for the gas reservoir geology and the low certainty of the reservoir and reserves, the distribution of producable reserves on the basis of economic evaluation and production technologies at present and the reservoir productivity with its influential factors are not well understood, which have effects on making the development deployment and the development decisions. Aiming at the problems the reservoir have to face with, the research on reservoir evaluation, reserves evaluation and productivity evaluation are carried out based on the deepen understanding of gas reservoir geology. Furthermore, reservoir exploitability, storey of gas exploitation and well pattern development are also focused on in this paper for gas reservoir engineering research of the early stage, which establish excellent foundation for making the development project.In this research, based on the information and data of this reservoir and evaluation techniques, and further carried out the structure appearance and the types of micro-reservoirs ,Suining formation gas reservoir of Xindu gas field.Xindu Suining Group is a gas reservoir north of the dumping South Yang-nose structure, the main reservoir for the Triangle Chau and plain-front subfacies of the distributary channel sand body, mainly in the North West to the South East to the distribution of the band; Suining Gas possession of JSN₁¹ and JSN₁² two major industrial gas in reservoir evaluation, preparation of the reservoir sand thickness, effective thickness, porosity, permeability, gas saturation, resistivity, storage coefficient, parameters such as production capacity coefficient floor plan, the combination of seismic, drilling, filling and test mining test data, prediction Outgassing favorable reservoir development zone in reserves evaluation, the recalculation of the gas reservoir geological reserves, and established a reserve classification evaluation criteria, the quality of its reserves available, the recent implementation of the size of available reserves and distribution, evaluation of the current under the technical and economic conditions can be developed reserves of 2.447 billion, in the evaluation of production capacity, gas well test results from the start of production of gas reservoir characteristics, and employ a variety of methods to predict the reasonable productivity gas wells, the initial single well reasonable productivity in the 0.8-2.0×10⁴m³ / d around on the basis of the above study proposed local gas reservoir development within the framework of the implementation of the feasibility.According to the characteristics of tight reservoir with low permeability, low abundance, low formation pressure, low productivity and strong heterogeneity, research of gas reservoir engineering, especially the numeric simulation and economic evaluation, is carried out to demonstrate the reasonable storey of gas exploitation, well pattern and production rate etc. technical countermeasure for the Suining formation gas reservoir and to propose the development deployment scheme for this reservoir:Xindu Suining group of two gas reservoirs can be used as a gas reservoir development of the system, using failure modes and the development of non-uniform cloth Well, the development of well spacing control in 600-800 m, with the average single well production 1.1×10⁴m³ /d about speed control gas production in 2 percent to 3 percent, is expected to be additional development drilling 6-12 mouth, the whole Suining Group gas reservoir can be formed 0.8×10⁸m³ /a natural gas production capacity around. Suining group for the gas reservoir and the whole Xindu gas field production capacity-building and laid the foundation for growth.Papers Finally, Xindu Suining gas reservoirs in the exploration and development of the existing problems put forward three proposals: First, to further strengthen Xindu Suining group Thin layer sandstone and gas-bearing sandstone of the earthquake prediction research to improve the success rate of drilling; Second, the proposed improved drilling technology, test drilling to protect air reservoir, Well Productivity results; third, optimized development zone, the gas reservoir Xindu Suining group net wells, well spacing, gas production speed, stable life, as well as drilling and fracturing technology content, such as research and test verification systems for the gas reservoir development programs lay the foundation for the establishment.