The Study Of Shallow Layer,low Pereamablity Gas Reservoir In Earlier Production Period

The Penglaizheng group gas reservoir of LuoDai Gas field is typical of low permeability, low pressure, low productivity, large reserves but low abundance, strong heterogeneity, complex gas-water contact, so we can conclude that it has special characteristic and difficulty in production quite different from normal gas reservoir, meanwhile, it need more sophistical technology for sake of the hard exploitation. To ameliorate the actual productivity, improve the actual grade of production, expedite the development, and abate the misconduct in the later decision-making, we come up with a series of researches, which is aiming at the specific problems in the earlier production period, and is focusing on reserves evaluation, productivity evaluation, storey of oil exploitation, well pattern development, production rate on the basis of our further acknowledge of reservoir. Meanwhile, we have provided the technical counter-measure for the verification of reserves and productivity, and sort the favorable development, which establish excellent foundation for the expedition of production, and the wise adoption of development project.By means of reserves evaluation, we have justified the productivity and recognized that the major reason of reserves variation is the diversification of gas bearing area, and established the classification standard of difficulty producing reserves of low premeability, understood the distribution and producing degree. The result of evaluation of productivity is that the productivity is low at large, which is controlled by the geological and engineering factors. Only when more compound methods are adopted, especially use the solution of the material balance equation and production equation to determination the poper productivity well at low pressure. It is likely that the credible productivity under the actual engineering condition can be calculated and understand the heterogeneity is the major factor affecting productivity of gas well found the Because of the low permeability, low pressure, low productivity, low abundance, strong heterogeneity, gas reservoir engineering, especially the digital simulation method, is employed to demonstrate the reasonable strouy of oil exploitation, well pattern and spacing, production rate etc. technical countermeasure for the Penglaizheng group gas reservoir, take the match corporation between the fracture half-length and well spacing into well pattern development in the first time.