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井楼油田一区稠油油藏经过20多年的蒸汽吞吐,已进入日产油量低、含水高、油汽比低和井间汽窜严重的高周期吞吐阶段,稳产难度增大,随着开采时间的延长,地层压力下降,汽窜现象变得更严重。如何防治汽窜,确保油井有效开采,提高油藏的开发效果,变成油田生产的首要问题。本文从井楼油田一区油藏储层特征、原油物性、油藏分布状况及生产实际等方面对油藏蒸汽吞吐阶段汽窜特征进行研究。通过对该块10年开发历程的跟踪及开发数据的分析,对井楼油田一区的汽窜现场表现进行了描述,揭示了井楼油田一区油藏的汽窜规律具有多向性、选择性、重复性等特征,结合汽窜特征、油藏地质特征和蒸汽吞吐生产特点分析汽窜的产生原因,包括油层物性好、原油粘度高、井距过密等。
After more than 20 years of steam huff and puff, the heavy oil reservoir in the first block of Jinglou Oilfield has entered the stage of high-cycle throughput with low daily production, high water cut, low oil-steam ratio and severe gas-channeling between wells. As a result, With the extension of time, the pressure of formation decreases and the phenomenon of steam channeling becomes more serious. How to control the steam channeling, to ensure effective oil production, improve the development of the reservoir effect, the primary problem of oilfield production. In this paper, we study the gas-channeling characteristics of the reservoir during the steam huff-and-puff phase from aspects of reservoir characteristics, crude oil physical properties, reservoir distribution and production practice in the first block of Jinglou Oilfield. Through the tracking and development data analysis of the 10-year development course of this block, the field performance of gas-channeling in the first area of Jinglou Oilfield is described, which reveals that the gas-channeling rules of the first-zone oil reservoir in Weilou Oilfield are multi-directional. Sex, repeatability and other characteristics, combined with steam channeling characteristics, geological characteristics of the reservoir and steam huff and puff production characteristics analysis of the causes of steam channeling, including good reservoir properties, crude oil viscosity, well spacing and so on.