上海地区浅部地应力测量及其构造地质意义分析   总被引：3，自引：3，他引：0  

张浩  施刚  巫虹  邵磊  王乾 《地质力学学报》2020,26(4):583-594

通过水压致裂法与超声波成像测井法相结合的方法,对上海地区浅部（180 m深度范围）原位地应力进行了测量。测量结果表明:最大水平主应力值在9.54~12.91 MPa之间,最小水平主应力值在5.41~6.96 MPa之间,最大水平主应力方向为北西42°-62°,优势方位为北西,地应力结构为S_H > S_h > S_v,可以反映区域构造应力场特征。依据区域内断裂空间分布特征和现今实测地应力结果综合分析认为,北东向断裂易于发生压性或压扭性逆断活动,断裂相对稳定;而北西向断裂易于发生张性或张扭性正断活动,在现今相对较高的应力水平状态下仍值得关注。测量结果可能对于揭示区域构造界线（江山-绍兴断裂）的走向有一定启示。   相似文献   

Geological characteristics and co-exploration and co-production methods of Upper Permian Longtan coal measure gas in Yangmeishu Syncline,Western Guizhou Province,China     

《China Geology》2020,3(1):38-51

Coal measure gas (also known as coal-bearing unconventional gas) is the key field and development direction of unconventional natural gas in recent years. The exploration and evaluation of coal measure gas (coalbed methane, coal shale gas and coal measure tight sandstone gas) from single coalbed methane has greatly expanded the field and space of resource evaluation, which is of positive significance for realizing the comprehensive utilization of coal resources, maximizing the benefits and promoting the innovation of oil and gas geological theory and technological advances in exploration and development. For the first time, in Yangmeishu Syncline of Western Guizhou Province, the public welfare coalbed methane geological survey project of China Geological Survey has been carried out a systematic geological survey of coal measure gas for the Upper Permian Longtan Formation, identified the geological conditions of coal measure gas and found high quality resources. The total geological resource quantity of coalbed methane and coal shale gas is 51.423×10⁹ m³ and the geological resource abundance is up to 566×10⁹ m³/km². In this area, the coal measures are characterized by many layers of minable coal seams, large total thickness, thin to the medium thickness of the single layer, good gas-bearing property of coal seams and coal measure mudstone and sandstone, good reservoir physical property and high-pressure coefficient. According to the principle of combination of high quality and similarity of key parameters of the coal reservoir, the most favorable intervals are No.5⁻², No.7 and No.13⁻² coal seam in Well YMC1. And the pilot tests are carried out on coal seams and roof silty mudstone, such as staged perforation, increasing hydraulic fracturing scale and “three gas” production. The high and stable industrial gas flow with a daily gas output of more than 4000 m³ has been obtained, which has realized the breakthrough in the geological survey of coal measure gas in Southwest China. Based on the above investigation results, the geological characteristics of coal measure gas in the multi-thin-coal-seam-developed area and the co-exploration and co-production methods, such as the optimization method of favorable intervals, the high-efficiency fracturing and reservoir reconstruction method of coal measures, and the “three gas” drainage and production system, are systematically summarized in this paper. It will provide a reference for efficient exploration and development of coal measure gas in similar geological conditions in China.  相似文献   

多极子阵列声波测井资料在塔河油田酸压设计施工中的应用   总被引：1，自引：0，他引：1       下载免费PDF全文

高坤  陶果  马勇 《地球物理学进展》2006,21(4):1227-1231

由于塔河油田灰岩裂缝性储层非均质性强、横向连通性差,需要对其进行有效的酸化压裂改造以获得具有经济价值的油气产能.近几年来,多极子阵列声波测井仪（主要DSI和XMAC）已投入塔河油田测井现场服务,这些新的声波测井资料经合适的软件处理后可获的极为丰富的地层信息.本文讨论了我们编制的多极子阵列声波测井资料处理软件及其在塔河油田酸压设计施工中的应用.通过多极子阵列声波测井资料处理得到的岩石力学特性分析,确定了地层应力的大小和方向,计算出酸化压裂所需的压力以及压裂后压裂缝的高度.计算结果在实际施工中得到了很好验证.  相似文献   

Tensile Fractures and in situ Stress Measurement Data Constraints on Cretaceous–Present Tectonic Stress Field Evolution of the Tanlu Fault Zone in Shandong Province, North China Craton          下载免费PDF全文

YANG Chengwei  WANG Chenghu 《《地质学报》英文版》2023,97(6):1616-1624

Tectonic stress fields are the key drivers of tectonic events and the evolution of regional structures. The tectonic stress field evolution of the Tanlu fault zone in Shandong Province, located in the east of the North China Craton (NCC), may have preserved records of the NCC’s tectonic history. Borehole television survey and hydraulic fracturing were conducted to analyze the paleo and present tectonic stress fields. Three groups of tensile fractures were identified via borehole television, their azimuths being NNW–SSE, NW–SE and NE–SW, representing multiple stages of tectonic events. Hydraulic fracturing data indicates that the study region is experiencing NEE–SWW-oriented compression and nearly-N–S-oriented extension, in accordance with strike-slip and compression. Since the Cretaceous, the orientation of the extensional stress has evolved counterclockwise and sequentially from nearly-NW–SE-oriented to NE–SW-oriented and even nearly N–S-oriented, the stress state having transitioned from strike-slip-extension to strike-slip-compression, in association with the rotating and oblique subduction of the Pacific Plate beneath the NCC, with the participation of the Indian Plate.  相似文献