煤层气井产出剖面测试技术及应用

现有常规油气井产出剖面测试方法在煤层气井中适应性较差，测试范围和测量工艺等存在局限性，施工成功率低。因此，本文对煤层气井产出剖面测试技术进行了整体的系统化设计和研发。通过紧凑的结构设计、高度集成，研发了一套可同时进行温度、压力、磁性定位、热式流量、探针持气率、微波持气、涡轮流量和超声流量等多参数测量的煤层气井测井仪，并研制了一套一次下井可进行多种测试技术测量的煤层气井产出剖面测试技术。同时提高了测试仪器的精度和抗干扰能力，开发了多任务多窗口的便携地面系统操作，并研制新型偏心测试井口应用于煤层气井，实现修井作业时不间断连续测试。该技术在鄂尔多斯盆地石楼北区块3口煤层气井进行了现场试验，取得精确、连续的测试数据。测试结果显示，石楼北区块8^#+9^#煤层为主力产气、产水层。

Production Profile Test Technology and Application of Coalbed Methane

At present, the existing conventional oil and gas well production profile testing methods have limitations such as testing range and measuring technology,low construction success rate,and poor adaptability in coalbed methane wells. In order to make an improvement, a systematic design and development of coal-bed gas well production profile testing technology were carried out. Through the compact structure design and high integration, a set of coalbed methane logging instrument has been developed, which can simultaneously measure the temperature, pressure, magnetic positioning, thermal flow, probe gas, microwave gas, turbine flow, ultrasonic flow,and other multiple parameters. A multi-purpose one-time testing technology for single well coal bed methane production logging profile has been developed. A multi task and multi window portable ground system operation has been developed, and a new type of eccentric testing wellhead has also been developed and applied to coalbed methane well to realize continuous testing during workover. The technology was tested in three coalbed methane wells in north Shilou block, Ordos basin, the test data obtained are accurate and continuous,and the anti-interference ability are improved. The test results show that the 8^#+9^# coal seam in north Shilou block is the main gas and water producing layer.