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基于岩芯定量描述和FMI成像测井资料的系统统计和分析,明确了轮古7试验区奥陶系潜山构造裂缝基本特征.本区构造裂缝以NE-SW走向为主,总体上较发育但非均质性强,裂缝发育区局部集中分布.构造裂缝纵向上主要分布在潜山面以下0—150m范围内,以发育中-高角度缝为主.构造裂缝充填物主要为泥质和方解石,充填缝占60.6%.发育在潜山面附近的裂缝常被泥质半-全充填,而与岩溶作用有关的洞顶缝为未充填或方解石半充填.钻井统计表明本区裂缝型储层所占比重较大,达到44.9%.构造裂缝发育带与中-小型洞穴发育区叠合位置易发育缝洞型储集体,这也是本区今后优选上钻的重要目标,比较合适的井型为水平井或大斜度井.轮古7试验区构造裂缝易沟通下部水体,导致油井快速见水并影响原油采收率,因此开发过程中要及时根据油井生产动态特征采取合理措施控水增油.预测了13个构造裂缝比较发育的区域,优选出5个为缝洞型储层钻探有利区.
Based on the systematic statistics and analysis of core quantitative description and FMI imaging well logging data, the basic features of structural fractures of Ordovician buried hills in Longgu7 test area were clarified.The tectonic fractures in this area are dominated by NE-SW trend and generally developed However, the heterogeneity is strong, and the fractured development area is locally concentrated.The tectonic fractures are mainly distributed longitudinally within the range of 0-150m below the buried hill surface, with the development of medium- and high-angle seams.The tectonic fracture fillings are mainly composed of argillaceous and Calcite and filling seams account for 60.6% .The fractures near the buried hill are often half-filled and all-filled, while those related to karstification are not filled or calcite semi-filled.The drilling statistics show that the fractures Layer accounted for 44.9% of the total.The structural fracture development zone and the small-medium-sized cave development zone are prone to develop fractured-cave reservoirs, which is also an important target of the optimal drilling in this area in the future. The horizontal well or the high-gradient well.It is easy to communicate the lower part of the water in the structural fracture of the Lun7 / 7 pilot area, causing the oil well to see the water quickly and affecting the oil recovery rate. Therefore, it is necessary to take reasonable measures to control the water production according to the dynamic characteristics of oil well production in time Oil. Forecast 13 Comparative tectoclase development region, preferably the 5 drilling is advantageous vug reservoir region.