强底水砂岩油藏水平井含水上升模式及不同开发阶段下产水规律影响因素——以塔河油田九区为例
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Study on the rising pattern of water content in horizontal wells in strong bottom water sandstone reservoirs and the influencing factors of water production law under different development stages——Take the ninth district of the Tahe Oilfield as an example
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    摘要:

    强底水砂岩油藏生产中后期,进入中高含水期,底水锥进现象突出,产量递减严重,需采取排水控锥等调流场措施维持正常的生产,明确油藏的含水上升规律的主控影响因素及含水上升模式能有效的指导调流场工艺措施的实施。基于塔河油田九区生产现状,对井区水平井产水情况进行了统计,总结了现阶段井区水平井含水上升模式图版;根据井区地质及工程特征,结合不同生产阶段条件下的含水上升规律模式,在时间与空间上定性分析了油藏含水上升规律的主控因素;结合灰色关联法及机器学习方法计算不同区域不同生产阶段各影响因素的关联度,在时间与空间上定量分析油藏含水上升规律的主控因素。结果表明:现阶段塔河油田九区水平井含水上升模式图版为:爬坡型、阶梯型、快速水淹型和开井水淹型四种。结合定性定量分析,生产初期含水上升规律的主控因素为:构造位置、避水高度水平井井段与古河道方向夹角;开采中期含水上升变化规律由层内夹层展布为主,储层非均质性为辅;后期流场调节主要受储层非均质性及夹层展布影响。为不同生产阶段条件下的提液控液及流场调节等工艺措施的实施提供一定的理论指导。

    Abstract:

    In the middle and late stages of the production of strong bottom water sandstone reservoirs, entering the medium and high water content period, the bottom water cone inlet phenomenon is prominent, the output is seriously decreasing, and it is necessary to take drainage control cone and other flow control field measures to maintain normal production, and clarify the main control influencing factors of the water content rise law of the reservoir and the water content rise mode can effectively guide the implementation of the process measures of the flow control field. Based on the production status of the nine areas of Tahe Oilfield, the water production of horizontal wells in the well area is statistically calculated, and the pattern of water rise of horizontal wells in the well area at this stage is summarized, and according to the geological and engineering characteristics of the well area, combined with the law mode of water content rise under different production stages, it is qualitatively analyzed in time and space The main control factors of the rising law of reservoir water content are calculated in combination with the grey correlation method and machine learning method, and the correlation degree of each influencing factor in different production stages in different regions is calculated, and the main control factor of the rising law of oil reservoir water content is analyzed in time and space. The results show that at present, the patterns of water content rise of horizontal wells in the ninth area of Tahe Oilfield are four types: climbing type, ladder type, rapid flooding type and open well flooding type. Combined with qualitative and quantitative analysis, the main controlling factors of the rising law of water content in the early stage of production: the structural position, the angle between the horizontal well section of the well and the direction of the ancient river channel in the water avoidance height, and the law of the rise of water content in the middle of the mining period is mainly spread by the interlayer within the layer. Reservoir heterogeneity is supplemented by late flow field regulation is mainly affected by reservoir heterogeneity and interlayer spread. It provides certain theoretical guidance for the implementation of process measures such as liquid extraction control and flow field regulation under different production stage conditions.

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刘学利,郑小杰,马新平,等. 强底水砂岩油藏水平井含水上升模式及不同开发阶段下产水规律影响因素——以塔河油田九区为例[J]. 科学技术与工程, 2023, 23(4): 1494-1517.
Liu Xueli, Zheng Xiaojie, Ma Xinping, et al. Study on the rising pattern of water content in horizontal wells in strong bottom water sandstone reservoirs and the influencing factors of water production law under different development stages——Take the ninth district of the Tahe Oilfield as an example[J]. Science Technology and Engineering,2023,23(4):1494-1517.

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  • 收稿日期:2022-06-28
  • 最后修改日期:2022-11-17
  • 录用日期:2022-09-30
  • 在线发布日期: 2023-03-03
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