Proposed Southern California lease offering, April, 1984 : final environmental impact statement /

Mode of access: Internet.

The design of offshore drilling structures.

"Paper no. 54-Pet-19 for presentation at the ninth annual Petroleum Mechanical Engineering Conference, Los Angeles, California September 27-29, 1954. American Society of Mechanical Engineers."

Community water supply well shooting/blasting near Hillcrest Subdivision, Lake County, Illinois.

The purpose of this fact sheet is to provide a summary of literature research on the use of well "shooting" or blasting technology in Northern Illinois. Water well shooting or blasting is done to increase water yield from a sandstone aquifer for a particular water supply well ... The Lake County Health Department (LCHD) detected a chemical, vinyl chloride -- from a family of chemicals known as volatile organic compounds (VOCs) -- in some private wells in the unincorporated Hillcrest Subdivision near Wauconda, through routine well testing done in the fall of 2003. The LCHD presented these findings to the public at a January 13, 2004 meeting. The concern was raised at the public meeting that recent subsurface water well "shooting" or blasting techniques, performed in the deep sandstone aquifer (800 to 1,000 feet below ground surface), in the borehole of a community water supply (CWS) well in the area, might have impacted the shallow aquifer in such a way as to contribute to private well contamination under investigation in the Hillcrest Subdivision.

Regional environmental impact statement, Gulf of Mexico /

At head of title : Draft.

Formulação de pastas cimentícias com adição de suspensões de quitosana para cimentação de poços de petróleo

Primary cementing is one of the main operations in well drilling responsible for the mechanical stability and zonal isolation during the production of oil. However, the cement sheath is constantly under mechanical stresses and temperature variations caused by the recovery of heavy oil. In order to minimize fracture and wear of the cement sheath, new admixtures are developed to improve the properties of Portland cement slurries and avoid environmental contamination caused by leaking gas and oil. Polymers with the ability to form polymeric films are candidates to improve the properties of hardened cement slurries, especially their fracture energy. The present study aimed at evaluating the effect of the addition of a chitosan suspension on cement slurries in order to improve the properties of the cement and increase its performance on heavy oil recovery. Chitosan was dissolved in acetic ac id (0.25 M and 2 M) and added to the formulation of the slurries in different concentrations. SEM analyses confirmed the formation of polymeric films in the cementitious matrix. Strength tests showed higher fracture energy compared to slurries without the addition of chitosan. The formation of the polymeric films also reduced the permeability of the slurry. Therefore, chitosan suspensions can be potentially used as cementing admixtures for heavy oil well applications

煤层气与常规天然气测试技术的异同

煤层气测试资料的分析成果对确定煤层气的排采制度和制订合理的开发方案是至关重要的,研究该问题的目的在于解决目前只能利用常规方法进行测试、常规软件进行测试资料解释的问题。煤储层在成份、结构及其物理力学性质上与常规储层(如砂岩)有着明显的差异;煤层气的赋存和采出机理与砂岩中天然气也有着本质区别。要获取煤层准确参数、正确评价煤层,必须研究煤层气测试的相关理论方法。但目前对煤层气测试的认识较少。从常规天然气测试与煤层气测试的差异对比的角度出发,给出了煤层气测试的诸多特征。从研究对象的储层特征、煤层气的赋存特征以及不同开发阶段的流体分布及流动特征等方面,论述了煤层气与常规天然气测试技术异同的根本原因。从测试方法、测试工艺、解释模型和资料分析方法等方面,分析了煤层气与常规天然气测试技术的差异。研究成果对充分认识和理解煤层气测试的重要作用有积极的意义。

南海北部陆缘深水区构造演化及其资源效应

南海北部陆缘深水区（水深>300m）蕴藏着丰富的资源，我国对深水区的地质研究刚刚起步，但相关领域已成为科研热点。深水油气盆地的构造演化是油气勘探中最重要的基础性研究之一，因此针对我国南海北部陆缘深水区开展构造演化及其资源效应的研究具有重要的理论意义和实际意义。 本文利用钻井和地震资料并结合区域地质资料，重点研究了珠江口盆地深水区的结构和构造演化，取得如下创新性成果：1）首次利用半地堑分析方法系统解剖了研究区的结构、各构造单元发育特征，在此基础上指出五个有利油气运聚带；2）采用回剥法并利用最新资料进行校正，得到了研究区更为可靠的构造沉降曲线，重新划分了裂陷期和裂后期的分界，认为32Ma南海海底扩张之后裂陷作用仍在持续，直到23Ma左右才开始大规模裂后热沉降，并进一步解释了裂陷期延迟的形成机制；3）应用非连续拉张模型计算拉张系数的方程计算了研究区的壳幔拉张系数，指出了深水区地幔相对于地壳的优势伸展作用；首次运用平衡剖面技术重建了研究区的构造发育史，计算了各构造期的拉张率和沉积速率，指出研究区新生代整体呈现持续拉张，拉张系数在1.1-1.24之间；4）精细刻画了水合物钻采区的地质构造特征，建立了该区天然气水合物成藏的概念模式；建立了一套根据地震叠加速度计算流体势的方法，为水合物成藏规律的研究提供了新的思路。