A Comprehensive Formation Evaluation Method to Make the Fracturing Decision: A Real Case Analysis from a Low Permeability Formation in Jungger Basin of China

2013 ◽  
Author(s):  
Ben-Cheng Wang ◽  
Ren-Shi Nie ◽  
Jiang-Wen Xu ◽  
Shao-Bo Wei ◽  
Guang-Wen Hu ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Case Analysis ◽  
Real Case ◽  
Low Permeability ◽  
Formation Evaluation

scholarly journals An evaluation method of volume fracturing effects for vertical wells in low permeability reservoirs

2020 ◽  
Vol 47 (2) ◽  
pp. 441-448
Author(s):  
Anshun ZHANG ◽  
Zhengming YANG ◽  
Xiaoshan LI ◽  
Debin XIA ◽  
Yapu ZHANG ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Low Permeability ◽  
Vertical Wells ◽  
Volume Fracturing ◽  
Low Permeability Reservoirs

A New Formation Evaluation Technique for the Lower Tertiary in South Texas - Predicting Production in Low Permeability, Fine-Grained Sandstones

2004 ◽  
Author(s):  
John C. Rasmus ◽  
John P. Horkowitz ◽  
Thierry Chabernaud ◽  
Peter Graham ◽  
Malcolm Summers ◽  
...  
Keyword(s):  
South Texas ◽  
Low Permeability ◽  
Evaluation Technique ◽  
Formation Evaluation ◽  
Fine Grained ◽  
Lower Tertiary ◽  
New Formation

Evaluation of Site Selection for National Strategic Reserve Depots of Refined Petroleum Products

2013 ◽  
Vol 779-780 ◽  
pp. 1607-1612 ◽  
Author(s):  
Yong Jie Niu ◽  
Xin Mu ◽  
Chun Jiang Zhao ◽  
Hong Qi Wang
Keyword(s):  
Site Selection ◽  
Evaluation Method ◽  
Evaluation Model ◽  
Case Analysis ◽  
Petroleum Products ◽  
Fuzzy Evaluation ◽  
Evaluation Indexes ◽  
The Index System ◽  
Selection For ◽  
Strategic Reserve

Based on the primary factors that influence site selection for National Strategic Reserve Depots of Refined Petroleum Products, this paper establishes a comprehensive system of evaluation indexes. In accordance with the different tiers of the index system, this paper puts forward an evaluation model based on the multi-tier fuzzy evaluation method. Then the evaluation model is proved to be reasonable, effective and feasible via case analysis and calculation.

scholarly journals Data Quality in HL7 Messages -- A Real Case Analysis

2015 ◽  
Author(s):  
Ricardo Jorge Teixeira Ferreira ◽  
Manuel Eduardo Carvalho Duarte Correia ◽  
Francisco Nuno Rocha Goncalves ◽  
Ricardo Joao Cruz Correia
Keyword(s):  
Data Quality ◽  
Case Analysis ◽  
Real Case

Pillar Fracturing Production Enhancement Results for an Unconventional Calcareous Shale in Ecuador

2021 ◽  
Author(s):  
Alvaro Izurieta ◽  
Alexander Albuja ◽  
Andres Brito ◽  
Wan Xuepeng ◽  
Feng Yuliang ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Xrd Analysis ◽  
Carbonate Content ◽  
Low Permeability ◽  
Development Scenarios ◽  
Calcareous Shale ◽  
Acid Solubility ◽  
Infinite Conductivity ◽  
Reservoir Simulator ◽  
Rock Mechanical Properties

Abstract Economical production from low-permeability oil-saturated reservoirs has always been a challenge in a basin known for its mature assets. M2 limestone is a new challenge. To characterize, it was necessary to use the methodology based on shale plays, integrating information from different logs using a proprietary evaluation method. Applying pillar fracturing, creating stable voids between pillars, and hence, infinite-conductivity channels in geomechanically competent candidates resulted in economical production and proved reserves from a low-permeability calcareous shale. Geomechanics, mineralogy, and saturated intervals were addressed by using a combination of rock mechanical properties and mineralogy, carbon/oxygen logs, and X-ray diffraction (XRD) on drilling cuttings. Once the prospective zones in the M2 limestone intervals were selected, a conventional fracturing treatment was designed using a 3-D gridded simulator. The candidate well was evaluated for pillar fracturing by using results from geomechanics and the conventional fracture application. A pumping schedule that included pillar volume, spacer, and tail in stages was then designed. Results from the fracture simulator were loaded in a numerical reservoir simulator, and different development scenarios were evaluated. M2 limestone has shown production potential near areas where volcanic intrusion is present, or indicated hydrocarbon potential by oil shows observed on cuttings and high-gas readings during drilling. The data used for this project was collected during conventional reservoir development but had never been evaluated using an unconventional reservoir approach. XRD analysis and acid solubility tests confirmed that the reservoir does not contain a high-carbonate content nor acid solubility. Diagnostic Fracture Injection Test (DFIT) and minifrac analysis helped to define the size and fracturing technique to be used. Results from this work provided a better understanding of the reservoir; a development plan is needed to improve the investment return for this type of project. Geomechanical evaluation is fundamental to the application and design of pillar fracturing. This fracturing technique was selected because it used 43% less proppant than a conventional job, reduced risk of screen out, and provided higher productivity over a conventional fracturing job. This is the first time that pillar fracturing has been applied in this Ecuadorian reservoir. The production outcome proved reserves of 32°API oil and resulted in the largest fracturing job in Ecuador. Different development scenarios are proposed based on the results from this well. A complete workflow to characterize, design a hydraulic fracture job using proprietary geomechanical candidate selection criteria, and develop an unconventional calcareous shale is presented. The available data are the same as in a conventional reservoir, whereas the evaluation technique, as well as fracture design, is customized to this type of reservoir to attain economical production.

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