基于先进生产测井资料的油环水平井多相流入监测

R. Minakhmetova, I. Aslanyan, V. Nagimov, Llnur Shigapov, V. Kosolapov, V. Virt
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摘要

目前,具有气顶的油藏主要是通过钻各种设计的水平井来开发的。在井的运行过程中,经常可以观察到早期的气油比增加或含水率。这可能是由于井的完整性破坏和目标地层的地质特征造成的,当地层水从生产地层底部突破,气藏顶部由于钻入而流入时。控制不需要的水、气产源和储层流体产率的方法之一是利用面向储层的生产测井测量,沿着水平井段监测生产剖面。本文介绍了在Novoportovskoye油田钻入油环油藏的一口水平井的监测实例。本文提供了井投产后2个月、18个月和24个月进行的一系列测井调查的结果。第一次(参考)调查是在油井生产的最早阶段进行的;第二次和第三次——当油气比开始增加的时候。先进的生产测井测量包括高精度温度测井、分布电容测量和频谱声波测井。频谱声波测井资料沿水平井段确定了储层的生产层段。根据第一次调查结果,生产液沿井筒均匀流动。第三次和第二次勘探确定了储层的气侵层段。在对所有测量结果进行比较后,发现即使在第一次测井测量时,气体突破也可能被定位。在每次调查中,都使用温度模型进行多相流入剖面分析。水平井生产测井测量所产生的信息可以用于定位和预测油环井的天然气突破。利用这些数据,可以立即防止此类天然气突破。这些数据也可用于设计新井,以提高此类油田的开发效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiphase Inflow Monitoring in Horizontal Wells Producing from Oil Rims Based on the Advanced Production Logging Suite Data
Today, oil reservoirs with a gas cap on top are mainly developed by drilling horizontal wells of various design. In the course of well operation, early increase in gas-oil ratio or water cut can often be observed. These may be caused by both well integrity failure and the geology feature of the target formation when formation water breaks through from the bottom of the producing formation and gas inflows from the top of the reservoir as a result of coning. One of the ways of controlling unwanted water and gas production sources and reservoir fluid production rates is monitoring of production profiles along the horizontal sections of the well using a reservoir-oriented production logging survey. This paper describes an example of such monitoring at a horizontal well drilled into the oil-rim reservoir at the Novoportovskoye field. The paper provides the results of a series of logging surveys performed in 2, 18 and 24 months after the well commissioning. The first (reference) survey was performed at the earliest stage of the well production; the second and the third ones - when the gas-oil ratio started to increase. The advanced production logging survey included high-precision temperature logging, distributed capacitance measurements and spectral acoustic logging. The spectral acoustic logging data identified the producing intervals of the reservoir along the horizontal section of the well. According to the first survey results, the production fluid was flowing uniformly along the wellbore. The third and second surveys had identified the intervals of gas breakthrough in the reservoir. After all the survey results had been compared to one another, it was identified that the gas breakthrough could have been localized even during the first logging survey. In each survey, the multiphase inflow profiling was perfomed using a temperature modelling. Information generated as a result of production logging survey in the horizontal well allows localizing and predicting gas breakthroughs in wells drilled in oil rims. Using this data, such gas breakthroughs may be immediately prevented. The data can also be used when designing new wells to increase the efficiency of development of such fields.
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