Fracturability Index Maps for Fracture Placement in Shale Plays

Alzahabi, Ahmed; Soliman, Mohamed Y.

doi:10.1201/b22269-3

Cited by 2 publications

(4 citation statements)

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“…The fracturability index (FI) is another concept of sweet-spot identification for well and fracture placement. Alzahabi and Soliman [108][109][110] developed a new algorithm and optimization criterion called Cascade Fracturing Technology (Figure 32a) for fracture spacing to speed up production based on the FI by prioritizing the brittle and high in situ stress zones and considering the stress shadow along the laterals focusing on the productive segments of horizontal wells. Figure 32b shows their developed sweet-spot selection methodology for the placements of the well and fractures.…”

Section: The Practice Of Formation Fracturingmentioning

confidence: 99%

Fracture Modeling of Shale Oil and Gas Reservoirs in Texas

Gao,

Ali,

Soliman

2023

Energies

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Formation fracturing is the method of choice for developing shale oil and gas reservoirs that constitute a gigantic resource in the U.S.A. and many other countries but are characterized by a low permeability in the nano-Darcy range. The oil production of Texas has increased by about 5 million B/D in 15 years as a result of shale exploitation by massive multistage hydraulic fracturing. The mathematical modeling of this fracturing process is complex and can be approached in several ways. This paper first gives a concise description of the fracturing process as carried out in Texas. Included are the ranges of the key reservoir properties, as well as the injection fluid volumes and pressure, the composition of the injected fluid, proppant type, and volume, and other relevant data. Also included are the number of fracture stages, methods of zonal isolation, and diagnostic techniques used. An important variable considered is flowback, in particular, fluid retention and oil and gas production. High-salinity water production is discussed. Given the above variables, the currently used fracture simulators are briefly considered and compared, both the geomechanics-based and fracture-propagation-based. No single simulator can model the complete process. The directions currently being followed are briefly described. Also discussed is the simulation of the re-fracturing process and its range of success in increasing oil recovery from about the original ~5% to ~8%. Future processes such as plasma fracturing are mentioned, and their future applicability is discussed for further increasing oil recovery.

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Section: The Practice Of Formation Fracturingmentioning

confidence: 99%

Fracture Modeling of Shale Oil and Gas Reservoirs in Texas

Gao,

Ali,

Soliman

2023

Energies

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“…There are other additional peaks or zones observed in each FI method. For the Alzahabi et al (2015) method, the additional intervals include 4682, 4694 and 4720 m (Fig. 10b), whereas the Shanks et al (1976) method shows two additional zones at 4716 and 4722 m (Fig.…”

Section: Variable Density Log (Vdl)mentioning

confidence: 99%

“…Jin et al (2014) introduced three FI models: (1) the average product of normalized brittleness and rate of strain energy released, (2) the average between normalized brittleness and normalized fracture toughness, and (3) the average of normalized brittleness and normalized Young's modulus. In this study, different fracturability indices (FI) have been applied, based on the aforediscussed elastic properties, following the methods by Alzahabi et al (2015), Shanks et al (1976).…”

Section: Variable Density Log (Vdl)mentioning

confidence: 99%

“…Figure 10 represents the analyzed section of the Variable Density log (VDL). The resultant fracturability Index (FI) is based on two methods, by Alzahabi et al (2015), Shanks et al (1976), using the elastic properties (Young's modulus, shear modulus, bulk modulus, Poisson's ratio and bulk density of sediment) derived from the compressional and shear velocities (V p and V s ). The FI log based on Alzahabi et al (2015) shows six promising fracture zones, at 4656-4668, 4682, 4694, 4702, 4720 and 4734-4762 m (Fig.…”

Section: Variable Density Log (Vdl)mentioning

confidence: 99%

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Fracture detection using conventional well logging in carbonate Matulla Formation, Geisum oil field, southern Gulf of Suez, Egypt

Shalaby

Islam

2017

J Petrol Explor Prod Technol

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The non-availability of the advanced tools such as FMI and Borehole Televiewer has led to the use of conventional well logging methods in the examination of potential fractures and ultimately help in reservoir characterization and development. This study uses the said conventional well log data for fracture detection in the Upper Cretaceous Matulla Limestone Formation in the Geisum oil field, southern Gulf of Suez province, Egypt. Different applications have therefore been integrated together, which include the Secondary Porosity Index (SPI) with tri-porosity crossplot (M-N), the natural gamma ray spectroscopy (NGS), the Dual Laterolog-MSFL logs separation, the litho-density and compensated neutron logs and the Variable Density log (VDL), which is based on the responses of the compressional and shear waves in front of fractured zones. Good secondary porosity is prevalent in the Matulla Formation with SPI values reaching maximum values of 21.5 and 15.1% in the studied wells. Three and six fractured zones have been recognized in Geisum A-2 and Tawila N-1 wells, respectively, based on SPI logs. Several of these proposed zones are supported by other tools such as NGS, photoelectric (Pe), and VDL and fracturability Index (FI). This integrated method using various conventional well log has produced results suggesting great probability in fracture identification in the carbonate Matulla Formation.

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Fracturability Index Maps for Fracture Placement in Shale Plays

Cited by 2 publications

References 5 publications

Fracture Modeling of Shale Oil and Gas Reservoirs in Texas

Fracture Modeling of Shale Oil and Gas Reservoirs in Texas

Fracture detection using conventional well logging in carbonate Matulla Formation, Geisum oil field, southern Gulf of Suez, Egypt

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