沥青质沉积风险预测方法研究及应用

Research and Application of Asphaltene Deposition Prediction Method

王宇飞 陈华兴 刘义刚 白健华 方 舟 赵顺超 方 涛 冯于恬 庞 铭

WANG Yufei， CHEN Huaxing， LIU Yigang， BAI Jianhua， FANG Zhou， ZHAO Shunchao， FANG Tao， FENG Yutian， PANG Ming

沥青质的沉积会发生在油气生产过程的各个环节中， 在油藏内的沥青质沉积会增大油气开釆难度， 影响产量， 在井筒内的沉积会导致井筒堵塞， 增加修井难度。目前， 沥青质沉积的预测采用的是实验的方法， 往往耗时长、 效率低、 成本高。本文针对目前沥青质沉积预测的研究不足， 在大量调研国内外研究现状的基础上， 通过模拟井筒的温度压力场以及沥青质沉积相图， 建立了一套沥青质沉积预测模拟及风险等级评定方法。针对渤海油田的一口单井， 进行了实例计算。此方法快速方便， 准确性高且无需实验研究， 节省投入， 可作为沥青质沉积的一种快速预测手段， 为油田投产前及油田开发生产过程中的沥青质伤害预防、 伤害判断及伤害解除提供参考依据。图 5表 2参 14

Deposition of asphaltene occurs at all stages of the oil and gas production process. Asphaltene depositing in the reservoir will increase the difficulty to product oil and gas， while depositing in the wellbore will plug the wellbore which increases the difficulty of workover. At present，the asphaltene deposition was always predicted by the experimental method which was time-consuming， low efficiency and high cost. Aimed at the shortcomings of the current asphaltene deposition prediction method， based on a large number of researches， a set of asphaltene deposition prediction model and risk rating method was established by simulating wellbore temperature and pressure field and asphaltene deposition phase diagram. A single well in Bohai Oilfield was simulated. The method was quick and easy with high accuracy and no experimental study， and could be used as a quick prediction method for asphaltene deposition， which could provide suggestions for asphaltene damage prevention， judgments and release during oil field development and production.

10.19346/j.cnki.1000-4092.2018.01.033