CT Analysis Method for Particular Lithology Reservoir Rock

2011 ◽  
Vol 301-303 ◽  
pp. 1372-1377
Author(s):  
Yu Zhou ◽  
He Kun Guo ◽  
Guo Qi Wei ◽  
Yu Juan Zhang
Keyword(s):  
Evaluation Method ◽  
Oil And Gas ◽  
Volcanic Rocks ◽  
Qualitative Evaluation ◽  
Evaluation Criterion ◽  
Reservoir Rock ◽  
Chemical Components ◽  
Core Analysis ◽  
Oil And Gas Exploration ◽  
Ct Analysis

Core analysis is one of the most necessary means to recognize the geological characteristics of reservoirs. Recently, the oil and gas exploration of particular lithology such as volcanic, conglomerate, mud and carbonate rocks continued to make new breakthroughs. As a result, core analysis for particular lithology reservoir rock is increasingly significant. However, conventional methods of core analyzing have great limitations on particular lithology due to the complex chemical components and variable physical status. In order to obtain accurate experimental data and understand the seepage law of particular lithology, advanced core analysis methods are developed through the application of computed tomography (CT). Through the application of nondestructive CT testing for inner construction of core, and the establishing of CT evaluation criterion for the heterogeneity of particular lithology, the goals of analyzing the features and growth of holes and fractures in core and heterogeneity of core are archived. The evaluation criterion is composed by qualitative evaluation and quantitative evaluation, and gives the corresponding evaluation method and formula. The evaluation criterion provides the basis for CT analysis of particular lithology. The application of CT analysis for 211 cores of particular lithology shows: 1) Most conglomerates develops gravel-edge fractures, growth of the fractures is proportional to the level of gravel and inverse proportional to the degree of compaction. Holes in conglomerate are mainly corroding holes between gravel. The growth of holes is related to the composition of cement and compaction. With the lower gravel level, the number of holes and fractures decline. 2) Most volcanic rocks develop holes; some of them develop big holes or lots of holes. Several volcanic samples contain micro-fractures. The growth of holes and fractures in different volcanic rock categories are equivalent, but the type of holes and fractures are different. This research has opened new experimental means for cores of particular lithology. By increasing the skills of core analysis, this research has increased people’s knowledge of reservoir of particular lithology, and means a lot to oil and gas exploration and development.

Research on HSE Risk Assessment and Control in Oil-Gas Drilling Operations

2014 ◽  
Vol 919-921 ◽  
pp. 500-506
Author(s):  
Fei Li ◽  
Guang Zhang
Keyword(s):  
Risk Assessment ◽  
Evaluation Method ◽  
Oil And Gas ◽  
Assessment System ◽  
Control Measures ◽  
Fuzzy Evaluation ◽  
Oil And Gas Exploration ◽  
Gas Drilling ◽  
Drilling Operations ◽  
Oil Gas

As the leading of oil and gas exploration and development, oil-gas drilling operations with high investment, high technology, and other industries interchange and perennial wild characteristics, there are various HSE risks during operation. Constructing HSE risk assessment system of oil-gas drilling operations, using AHP to construct indicators were analyzed and compared, and calculate the index weight. Then build fuzzy evaluation matrix based on expert evaluation method, get fuzzy evaluation result is "high risk". Finally, from four aspects (people, object, environment, and management) proposed HSE control measures.

scholarly journals Unconsolidated fault vertical sealing ability evaluation method and its application during Stationary phase

2019 ◽  
Vol 23 (1) ◽  
pp. 35-42
Author(s):  
Ning Sun ◽  
Guang Fu ◽  
Lili Liu ◽  
Jingfeng Wu
Keyword(s):  
Stationary Phase ◽  
Evaluation Method ◽  
Oil And Gas ◽  
Relative Size ◽  
Reservoir Rock ◽  
Bohai Bay ◽  
Filling Material ◽  
Fault Rock ◽  
Sealing Ability ◽  
Oil Gas

To study the vertical distribution of oil, gas in the fracture zone of the oil and gas bearing basin, based on the mechanism and influence factors of vertical sealing oil and gas, this paper has studied the necessary conditions of unconsolidated fault vertical sealing oil, gas, determination method for compaction and diagenetic of the fault filling. Concluded that the static period of fault vertical sealing oil and gas required that fault should be cut by mudstone, through comparing the relative period of the fault rock starting consolidate and the fault stopping activity to determine whether the fracture fillings are compacted into rock. If the time fault rocks began compaction into rock is earlier than the time fault stopped activity, fault filling has been consolidated; otherwise not compaction. By determining the displacement pressure of the fracture filling material and the rock displacement pressure of the underlying reservoir, a method is established to evaluate static unconsolidated fault vertical sealing oil and gas ability by comparing the relative size of the two. Applied it in the evaluation of the vertical sealing capacity f1 in the one to three sections of the Dongying formation and 5 sections of the formation in the southern Bohai Bay Basin. The results show that the fault f1 in one to three of the Dongying formation have the greater filler displacement pressure than the displacement pressure of underlying reservoir rock, as the vertical sealed is favorable for oil and gas accumulation and preservation. It’s accordant with oil and gas distribution has been found in Dongying formation at present in the formation of the South Fort 5 structure, which indicates that the method is feasible to evaluate the vertical sealing ability of the fault in the stationary phase.

Novel microscopic imager instrument for rock and fluid imaging

Geophysics ◽  
2009 ◽  
Vol 74 (6) ◽  
pp. E251-E262 ◽  
Author(s):  
Marc H. Schneider ◽  
Patrick Tabeling ◽  
Fadhel Rezgui ◽  
Martin G. Lüling ◽  
Aurelien Daynes
Keyword(s):  
Oil And Gas ◽  
Image Interpretation ◽  
Core Sample ◽  
Reservoir Rock ◽  
Rock Properties ◽  
Oil And Gas Exploration ◽  
The Core ◽  
Video Acquisition ◽  
Visible Light Range ◽  
Acquisition Mode

Core analysis from reservoir rock plays an important role in oil and gas exploration as it can provide a large number of rock properties. Some of these rock properties can be extracted by image analysis of microscopic rock images in the visible light range. Such properties include the size, shape, and distribution of pores and grains, or more generally the texture, mineral distribution, and so on. A novel laboratory instrument and method allows for easy and reliable core imaging. This method is applicable even when the core sample is in poor shape. The capabilities of this technique can be verified by core images, image interpretation, and dynamic measurements of rock samples during flooding. A microscopic imager instrument is operated in video acquisition mode and can measure additional properties, such as fluid mobility, by detecting the emergence of injected fluids across the core sample.

Redefined Distribution of the Permian Volcanic Rocks in the Tarim Basin: Based on Logging and Seismic Data

2013 ◽  
Vol 448-453 ◽  
pp. 3723-3727 ◽  
Author(s):  
Yun Pan ◽  
Zong Xiu Wang ◽  
Mao Pan
Keyword(s):  
Tarim Basin ◽  
Seismic Data ◽  
Oil And Gas ◽  
Volcanic Rocks ◽  
Oil Field ◽  
Shielding Effect ◽  
Underlying Structure ◽  
Oil Exploration ◽  
Oil And Gas Exploration ◽  
The North

There are a lot of Permian volcanic rocks which are widely distributed in Tarim Basin. Because of the shielding effect of the volcanic rocks to the underlying structure, the distribution of the volcanic rocks in Tarim Basin is very important to the deep oil and gas exploration. However, with the progress of oil exploration in Tarim oil field in recent years, much more logging and seismic data is available. Based on the model of logging-seismic integrated identification, the distribution of the Permian volcanic rocks is revised by using the drilling, logging and seismic data. It shows that the rhyolite is mainly distributed in the north basin, and the basalt is widely distributed in the basin. Moreover, the basalt has larger area than which delineated by other people.

Control System Design of the Vehicle Mounted Hammer Source Based on PLC

2012 ◽  
Vol 619 ◽  
pp. 302-305
Author(s):  
Hong Yan Wang ◽  
Wen Sheng Xiao ◽  
Xiu Juan Lin ◽  
Xian Feng Wang
Keyword(s):  
Control System ◽  
System Design ◽  
Software Design ◽  
High Velocity ◽  
Simple Structure ◽  
Oil And Gas ◽  
Basic Structure ◽  
Control System Design ◽  
Oil And Gas Exploration ◽  
Gas Consumption

Considering the pollution on the environment using dynamite source in oil and gas exploration, harm and damage to people and building, the vehicle mounted hammer source which can replace dynamite source is presented. This paper describes briefly the basic structure and working principles of the vehicle mounted hammer source. A typical pneumatic circuit is researched and designed. And the pneumatic circuit is designed with the powerful functions of PLC, the hardware and software design are introduced. The system has advantages of strong striking force, high velocity, small gas consumption, simple structure and convenient control.

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