The Preset Cable Stratified Water Injection Testing Technology Research

The water flooding technology has always been an integral part of oil exploitation in our country, the main reason is that most of the oil fields in China belong to the continental sedimentary heterogeneous sandstone oilfield. But with the exploitation of oil, the change of reservoir, the traditional general water injection technology has been unable to meet the dynamic balance of all differences between the layers, resulting in reduced oil drilling efficiency. According to the specific conditions of the formation and development process, research and development of layered water injection technology, to further improve the water flooding recovery. But in fact, oilfield entered extra high water cut period, due to the restriction of technology, separate layer water injection technology in horizontal distance water flooding requirements there is a great distance, concrete face the following problems: the interlayer contradiction, interlayer difference injection qualified rate decreased rapidly, half time of water injection "unqualified"; Unable to long-term monitoring monolayer injection parameters and cannot help the understanding and analysis of reservoir potential remaining oil; injection well and the number of layers increases, testing workload increased year by year.In order to improve the qualification of water injection rate and solve some disadvantages of layering water injection, auxiliary reservoir understanding and analysis of tapping the potential of remaining oil effective water injection process. This article is in this context to carry out the research work and to the needs of water injection technology in our country at the present stage as a fundamental, preset cable type intelligent developed into water debugging and testing process, the testing and deployment of combined as one, long placed downhole real-time monitoring and recording the underground state and layered automatic simultaneous deployment manual deployment can also be carried out according to the requirements of the deployment of each layer. The process is the process of "multi synchronous measurement, encryption measuring adjusting cycle, continuous monitoring process parameters, centralized admission data, can realize the requirement of subdivision water injection, and Realization of each layer of the automatic synchronization of measuring and controlling, can reduce the manual measuring and adjusting workload, greatly improve the layered water injection test and regulating efficiency and precision, also can downhole monitoring parameters, offer the new technical support for tapping the latent power in remaining oil.ccording to the analysis of water injection technology, intelligent cable injection design of pre column layered water injection system, electrical equipment and electrical equipment and downhole, processing and control program of PC software and data. The control system uses STM32 as core processor is used for data collection, transmission, analysis and well water mouth to regulate; PC software based on C + + Builder as development environment to complete the data playback, measuring adjustment and control scheme of the input; a data processing part based on the wavelet analysis method is applied to downhole vortex shedding flowmeter vortex probe signal received interference resulting in inaccurate data problems and injection pressure of the analog to digital conversion; control scheme is combined with the actual control requirements in classical control theory is based on multi-layer underground water injection and real-time control.