Electronic pressure gauge storage test technology is to use the characteristics of high accuracy, high sensitivity, large storage capacity, long working time, flexible working system compilation and other characteristics of the electronic pressure gauge to transmit the pressure gauge through the well test wire to perform liquid level detection and gradient measurement for oil and gas well , Well temperature test, pressure drop test, pressure recovery test, edge detection test, interference well test and other test operations.
The oil and gas well prospecting liquid level test can timely grasp the downhole liquid level depth, and provide accurate parameters and working basis for the preparation of operational measures such as downhole sampling, pumping and drainage, and low-yield well liquid level recovery and production. By measuring the gradient, the pressure values ​​at different depths downhole can be accurately grasped, and the pressure gradient of the liquid in the well can be obtained, so as to achieve the purpose of analyzing the liquidity of each depth and determining the depth of the oil and gas boundary point. The pressure drop and pressure recovery tests can record the downhole pressure changes of oil and gas wells in time, and further analyze the formation characteristics parameters, lithology change characteristics, physical property changes after production, water injection damage and water injection front and other conditions. The edge detection is mainly used in early exploration and rolling exploration, and records and analyzes the changes in downhole pressure to obtain abnormal data of the reservoir boundary. Disturbance well test records and analyzes the pressure changes of the signal source well and the receiving well to accurately grasp the inter-well connectivity and oil well effectiveness during the oilfield water injection development process, and provide a basis for the adjustment of the development plan.
The application of high-precision electronic pressure gauges and computer technology in the field of well testing is a major breakthrough in the development of well testing technology. The advent of high-precision electronic pressure gauges and the development of high-speed electronic computers, as well as the creation of modern well-testing theoretical methods, greatly The breadth, depth and reliability of the problems that the well test can solve are expanded. Modern well test analysis methods are centered on plate fitting. The measured bottom hole pressure changes with time are drawn into various types of measured curves according to the coordinates of the theoretical plate, and the measured curves are fitted to the theoretical plate to solve the reservoir parameters. According to the pressure derivative curve reflecting the formation characteristics, not only can the formation parameters be accurately calculated, but also the analysis and judgment of the heterogeneous nature and boundary nature of the geological reservoir space can be made to make a preliminary evaluation of the reservoir. In the past 10 years, scholars at home and abroad have compiled modern well test analysis methods into various types of application software, so modern well test interpretation is done by computer. At present, western countries generally use high-precision electronic pressure gauges to record pressure data in exploratory well testing. Their accuracy reaches 0.025% to 0.05% of full scale (domestic precision is 0.1%, the resolution is low, and needs to be improved). Reaching 0.0001% ～ 0.0002% of full scale, and can simultaneously record the bottom hole pressure and temperature, sampling speed 1 data point / 1 ～ 3s, the sampling density is determined by computer programming according to the need; the length of test time and the number of recorded data points, surface Direct-reading electronic pressure gauge, can be extended arbitrarily without limitation
Electronic pressure gauge storage test technology is to use the characteristics of high accuracy, high sensitivity, large storage capacity, long working time, flexible working system compilation and other characteristics of the electronic pressure gauge to transmit the pressure gauge through the well test wire to perform liquid level detection and gradient measurement in oil and gas wells. , Well temperature test, pressure drop test, pressure recovery test, edge detection test, interference well test and other test operations.
The oil and gas well prospecting liquid level test can timely grasp the downhole liquid level depth, and provide accurate parameters and working basis for the preparation of operational measures such as downhole sampling, pumping and drainage, and low-yield well liquid level recovery and production. By measuring the gradient, the pressure values ​​at different depths downhole can be accurately grasped, and the pressure gradient of the liquid in the well can be obtained, so as to achieve the purpose of analyzing the liquidity of each depth and determining the depth of the oil and gas boundary point. The pressure drop and pressure recovery tests can record the downhole pressure changes of oil and gas wells in time, and further analyze the formation characteristics parameters, lithology change characteristics, physical property changes after production, water injection damage and water injection front and other conditions. The edge detection is mainly used in early exploration and rolling exploration, and records and analyzes the changes in downhole pressure to obtain abnormal data of the reservoir boundary. Disturbance well test records and analyzes the pressure changes of signal source wells and receiving wells to accurately grasp the inter-well connectivity and oil well effectiveness during the oilfield water injection development process, and provide a basis for the adjustment of development plans.
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