Tight Gas Wells Type Scheme Selection And Economic Benefit Evaluation

With the rapid growth of tight sandstone gas reserves and production, especially in thispart of the gas reservoirs in the development of oil and gas reservoirs in the proportion isgrowing, we expect the end of2020the annual production of tight sandstone gas reservoirs intight gas wells will total Yield30%of development. So tight sandstone gas reservoirs toimprove the level of development, achieve economies of scale and effective development, is amajor issue that we now have to solve. To achieve sustainable development of natural gas isalso an important guarantee.In the1970s and1980s, tight gas exploitation is considered only one of the "dessert",after a long period of time after mining, with the further deepening of the gas reservoirgeological knowledge, widely used in the development of late infill drilling ways to expandits production scale, thus further improving the degree of recovery of natural gas. Despite thelow tight sandstone gas reservoirs development pattern has taken shape, but still in the earlystages of mining, faces many challenges, including poor single well and stable, wellproductivity is low, low gas reservoir recovery, development costs are relatively high,relatively poor economic efficiency and so on. Tight gas reservoirs is the need to go through alarge measure of hydraulic fracturing, or is the use of horizontal wells, multi-lateral wells toindustrial output flow gas reservoirs. At present, the domestic gas reservoir permeabilityclassification criteria to classify as an evaluation index, the main division is hypertonic, thepermeability, low permeability and tight four categories.This article summarizes the production data for diagnosis and analysis of commonproblems and challenges, and presents a comprehensive analysis of diagnostic methods andanalysis processes, including the production decline and empirical methods and flow materialbalance analysis model-based approach as a supplementary analysis of tight gas reservoirproduction data to calculate the dynamic reserves. Finally, tight gas wells production dataanalysis examples.