scholarly journals A New Method for Evaluating Gas Well Boundary Characteristics

2021 ◽  
Vol 804 (2) ◽  
pp. 022022
Author(s):  
Wenbo Meng ◽  
Yi Huang ◽  
Shujie Liu ◽  
Donglei Jiang ◽  
Yi Yu ◽  
...  
Keyword(s):  
New Method ◽  
Gas Well ◽  
Boundary Characteristics

A New Real-Time Gas Well Productivity Evaluating Method

2011 ◽  
Vol 383-390 ◽  
pp. 5257-5263
Author(s):  
Leng Tian ◽  
Ying Hao Shen ◽  
Shao Jun Wang ◽  
Shun Li He
Keyword(s):  
Real Time ◽  
New Method ◽  
Low Permeability ◽  
Pressure Data ◽  
Daily Production ◽  
Gas Well ◽  
Well Productivity ◽  
Wellhead Pressure ◽  
Analysis Process ◽  
Evaluating Method

With the continuous development, the gas well productivity will decrease. The deliverability test can be used to evaluate gas well productivity, but this method always needs long test which will affect daily production seriously, especially for low permeability gas wells, also there always isn’t enough data in the field. Aiming at this problem, this article presents a new real time method to get the gas well productivity. This new method avoids deliverability test and only needs daily production and wellhead pressure data, so the analysis process is easy and this method has strong practicality. It is proved that this new method works well in the field case.

A New Real-Time Gas Well Productivity Evaluating Method

2012 ◽  
Vol 433-440 ◽  
pp. 1078-1084
Author(s):  
Leng Tian ◽  
Ying Hao Shen ◽  
Shao Jun Wang ◽  
Shun Li He
Keyword(s):  
Real Time ◽  
New Method ◽  
Low Permeability ◽  
Pressure Data ◽  
Daily Production ◽  
Gas Well ◽  
Well Productivity ◽  
Wellhead Pressure ◽  
Analysis Process ◽  
Evaluating Method

With the continuous development, the gas well productivity will decrease. The deliverability test can be used to evaluate gas well productivity, but this method always needs long test which will affect daily production seriously, especially for low permeability gas wells, also there always isn’t enough data in the field. Aiming at this problem, this article presents a new real time method to get the gas well productivity. This new method avoids deliverability test and only needs daily production and wellhead pressure data, so the analysis process is easy and this method has strong practicality. It is proved that this new method works well in the field case.

New Calculation Method and Application of Gas Loss From Coring Shale Gas Well

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Wuguang Li ◽  
Zhang Jian ◽  
Xiaokai Chen ◽  
Hao Chen
Keyword(s):  
Shale Gas ◽  
New Method ◽  
Gas Content ◽  
Gas Well ◽  
Measuring Device ◽  
Gas Dispersion ◽  
Well Production ◽  
Single Well ◽  
Shale Reservoir ◽  
Gas Loss

Abstract Gas content is one of the most important parameters of shale reservoir evaluation and productivity evaluation. In order to obtain gas content accurately, based on the first law of Fick and material balance equation, mathematical model of gas dispersion flow in shale reservoir is established, analytical solution is obtained, and evaluation method of gas dispersion in shale reservoir is formed. On the basis of this study, the onsite desorption gas measuring device and testing process for coring shale gas wells are designed, the time-varying shale desorption gas is obtained, and the residual gas of shale is measured by the crushing method. The calculation formula of shale gas content is obtained by fitting the test data, the shale gas loss, and total gas content are calculated, and then analyzed the influences of the shale gas-bearing properties and gas content on single well production and geological reserves by combining the data of shale absorbed gas. The results show that the gas content calculated by the new method is about 6.54% more than that of log interpretation, and about 7.57% on average more than that obtained by traditional empirical method. The gas content proportion of long Yi1 subsegmental small layers 1 and 2 is smaller than that of long Yi1 subsegmental small layers 3 and 4 and long Yi2 subsegmental. It is considered that the amount of shale gas lost is large, because of the pressure release during the coring, and the comparative error of gas content obtained by several methods is within the acceptable range. So the new method can be used as an important mean to obtain shale gas content. The most direct factors affecting gas content are complex: Buried depth, porosity, total organic carbon content, water saturation, and formation temperature. Shale gas content is the material basis of single well production and geological reserves of shale gas, and it is also the decisive factor. Therefore, the accurate evaluation of shale gas content is one of the key techniques to evaluate shale gas well productivity and shale gas resources, which is of great significance.

New Prospect Model for Liquid Loading in Gas Well Base on Energy Balance Theory

2014 ◽  
Vol 711 ◽  
pp. 117-120
Author(s):  
Xu Zhang ◽  
Wei Hua Liu ◽  
Tao Zhang
Keyword(s):  
Real Time ◽  
New Method ◽  
Gas Wells ◽  
Liquid Loading ◽  
Gas Well ◽  
Gas Recovery ◽  
Flow Situation ◽  
Actual Flow ◽  
Normal Production ◽  
Water Cut

Accurate and timely recognizing whether gas wells get effusion is one of the important guarantee to ensure the normal production of water-cut gas well. It often gets errors when using current normal recognizing methods of the critical carrying fluid flow model to predict and recognize the actual flow situation in these wellbores, which already have effusion or have been drained effusion by taking measures. This paper is based on the coordinating relation between the energy of gas well itself and the energy required for draining effusion out, establishing a new method to recognize gas well effusion, and establishing a relatively complete system of gas well effusion identification. Combined with field production data, this method can be more accurately used to recognize gas effusion and real-time trace, and it can avoid the above problems. Combined with the instance of gas well for real-time effusion diagnosis, the predicted result is very good agreement with actual situation. This new method has important guiding significance for the normal production of water producing gas wells and the implementation of related gas recovery with water draining.

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

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