分层注水井下监测与数据传输技术的发展及展望

概述了中国分层注水井下监测与数据传输技术的发展状况,按照发展阶段介绍了传统井下数据获取方法、电缆直读通讯与测调技术、预置电缆井下参数实时监测通讯技术以及井下无线通讯技术,详细介绍了技术原理、施工工艺、技术适应性和应用概况,指出了现有井下监测与数据传输技术存在的问题及面临的挑战,最后根据生产需求,提出了分层注水井下监测与数据传输技术的发展方向。对于已规模应用的电缆高效测调井,着重实现井下堵塞器数字化;对于重点监测井,进一步完善预置电缆通讯技术,发展基于复合连续管的井下监测与数据传输技术,提高施工的便捷性和可靠性;对于规模生产应用,发展井下无线通讯技术,重点实现测调自动化,并结合地面移动通讯网络,加快构建覆盖控制中心、配水间和油藏的数字化通讯网络,为油藏开发数字化提供技术支撑。

Development and prospect of downhole monitoring and data transmission technology for separated zone water injection

This article outlines the development of downhole monitoring and data transmission technology for separated zone water injection in China.According to the development stages,the principles,operation processes,adaptability and application status of traditional downhole data acquisition method,cable communications and testing technology,cable-controlled downhole parameter real-time monitoring communication method and downhole wireless communication technology are introduced in detail.Problems and challenges of existing technologies in downhole monitoring and data transmission technology are pointed out.According to the production requirement,the future development direction of the downhole monitoring and data transmission technology for separated zone water injection is proposed.For the large number of wells adopting cable measuring and adjustment technology,the key is to realize the digitalization of downhole plug.For the key monitoring wells,cable-controlled communication technology needs to be improved,and downhole monitoring and data transmission technology based on composite coiled tubing needs to be developed to make the operation more convenient and reliable.For large-scale application in oil fields,downhole wireless communication technology should be developed to realize automation of measurement and adjustment.In line with ground mobile communication network,a digital communication network covering the control center,water distribution station and oil reservoir should be built quickly to provide technical support for the digitization of reservoir development.

油田注水用复合管受力性能研究

近年来,一种新型纤维增强热塑性复合管开始在井下分层精细注水领域进行应用。研究了该复合管用于油田井下注水时在组合载荷作用下的尺寸及力学性能的变化规律。选取中国石油吉林油田某油井作为研究对象,该井井深1000m,正常注水压力25MPa,选取了上、中、下三处典型位置的组合载荷,并模拟管柱多种使用工况。试验过程中测量复合管的尺寸变化,模拟试验完成后进行破坏性试验,最终得到40℃和60℃下爆破值较常温分别下降7.6%和11.6%,说明温度对复合管爆破压力有较大影响。并且在一定温度范围内,轴向力和管材的伸长率几乎呈线性关系,内压对管材伸长具有一定的抑制作用。通过对组合载荷下复合管力学性能变化规律的研究,有助于指导该类型复合管更好地应用于井下注水领域。