Comprehensive Study And Evaluation To Behavioral Characteristics Of Difficult-to-produce Reserves Of Luodai Gas Field

Gas Reserves Evaluation is the basis of gas field development design. The result of Gas Reserves Evaluation is connected directly with the scale of gas field development and reliability of all kinds of indexes of development and also connected with holistic benefit. The Penglaizhen group gas reservoir and Suining group gas reservoir is typical of low permeability, low pressure, low productivity, large reserves but low abundance, strong heterogeneity gas reservoir. The employment of proved reserves of gas reservoir is difficult, the daily gas rate of well is low, and the ratio of remained reserves and recoverable is high. Then how to evaluate the part of proved reserve and give the foundation of gas field development is the problem for the development of Luodai Gas Field problem. In the research, static geological data, the productive data of reservoirs, the pressure of wells, pressure build-up data for well test, the fiuids(gas, oil and water) produced from reservoirs' analysis and test data and the data of water fractured are collected. Connect with static geological reservoirs data, research and evaluate the hardy employed proved reserves of Luodai Gas Field integrative.By the research of geology of the gas reservoir, induced the concept of hardy employ reserve; by contrast the pressure and productivity of wells with the initial and current, induced predominance distributed area of the high productive ability and high pressure of well; collected 104 wells' pressure build up data of Penglaizhen group and Suining group gas reservoirs and interpreted it by Saphir 2.30. On the basis of research, brought forward well modern, reservoir model and boundary model of well test interpretation; also interpreted the fractured wells' pressure, the result indicates that water fracture is the main development means for Luodai Gas Field. Survey many kinds of methods of calculation for gas reserves, and according to the practice of Luodai Gas Field, the methods are improved and modified. Then calculated the well's recoverable reserve of Penglaizhen group gas reservoir and Suining group gas reservoir. With the detailed research on reservoir dynamic character, combined with economic utmost productivity. And by the integrative evaluation of Penglaizhen group gas reservoir and Suining group gas reservoir, Suining group gas reservoir is better than Penglaizhen group gas reservoir.