渤中26-6构造太古界潜山储层含水识别方法

Method of Identifying Water Content in the Archaean Buried Hill Reservoir of BZ 26-6 Structure

郭明宇 李战奎 徐鲲 张学斌 李文龙

GUO Mingyu LI Zhankui XU Kun ZHANG Xuebin LI Wenlong

中海石油（中国）有限公司天津分公司, 天津 300459 中海油能源发展股份有限公司工程技术分公司, 天津 300459

Tianjin Branch of CNOOC Ltd., Tianjin, 300459, China CNOOC EnerTech-Drilling & Production Co., Tianjin, 300459, China

渤中26-6构造太古界潜山储集层非均质性强，油气分布不均，流体性质复杂。为解决钻井过程中太古界潜山流体性质判断困难、储层是否含水等难题，研究建立了潜山储层含水识别方法。通过分析渤海油田已钻潜山井油层和水层录井特征，以气测、三维定量荧光、地化和红外光谱等录井数据和图谱为基础，结合荧光滴照和裂缝发育情况，形成了油层和水层的区分图版和标准图谱，建立了渤中26-6构造太古界潜山储层含水识别方法。太古界潜山储层含水识别方法在渤中26-6构造8口井进行了现场应用，储层含水识别准确率100%，油水界面深度的判断与测试结果一致，取得了良好的应用效果。该方法能够为勘探决策提供重要依据，具有较好的推广应用价值。

The Archaean buried hill reservoir of Bozhong (BZ) 26-6 Structure has strong heterogeneity, uneven distribution of oil and gas, and complex fluid properties. In order to solve the difficulties in determining the fluid properties of the Archaean buried hill and the reservoir water content during drilling, a method for identifying the water content of the buried hill reservoir was developed. By analyzing the characteristics of gas logging, three-dimensional, geochemical, and infrared spectroscopy, and other logging technologies in data and spectra of oil and water layers in the buried hill operation section of Bohai Oilfield, a differentiation chart and standard spectrum of oil and water layers were formed based on the fluorescence drop illumination and fracture development. In addition, a method for identifying water content in the Archean buried hill reservoir in the BZ 26-6 Structure was established. The method was applied in eight wells of the BZ 26-6 Structure. The study achieved 100% accuracy in identifying the water content in the reservoir and the judgment of the depth of the oil-water interface was consistent with the test results, attaining positive on-site application results. This method can provide an important basis for exploration decision-making and has great promotion and application value.

中海石油（中国）有限公司“七年行动计划”重大科技专项“渤海油田上产4000万吨新领域勘探关键技术”（编号：CNOOC-KJ 135 ZDXM 36 TJ 08 TJ）部分研究内容

https://doi.org/10.11911/syztjs.2023072