Microseismic monitoring of hydraulic-fracturing programs in the Cooper Basin, Australia

Waldron, Alan; Camac, Bronwyn

doi:10.1190/tle35010072.1

Cited by 4 publications

(1 citation statement)

References 1 publication

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“…By arranging high-sensitivity seismic sensors around the fracturing wells, the microseismic monitoring technology can capture hydraulic fractures in real time from coal seam (Wang et al., 2015). According to the microseismic travel time, the location of the seismic source, namely the location of fracture, can be calibrated (Waldron and Camac, 2016; Zhu et al., 2017). The spatial distribution of the hydraulic fractures can be described accurately by the spatial distribution of the microseism and its projection on the plane in the cylindrical coordinate system.…”

Section: Materials and Methodologymentioning

confidence: 99%

Fracturing curve and its corresponding gas productivity of coalbed methane wells in the Zhengzhuang block, southern Qinshui Basin, North China

Chen

Liu

Cai

et al. 2020

Energy Exploration & Exploitation

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Hydraulic fracturing has been widely used in low permeability coalbed methane reservoirs to enhance gas production. To better evaluate the hydraulic fracturing curve and its effect on gas productivity, geological and engineering data of 265 development coalbed methane wells and 14 appraisal coalbed methane wells in the Zhengzhuang block were investigated. Based on the regional geologic research and statistical analysis, the microseismic monitoring results, in-situ stress parameters, and gas productivity were synthetically evaluated. The results show that hydraulic fracturing curves can be divided into four types (descending type, stable type, wavy type, and ascending type) according to the fracturing pressure and fracture morphology, and the distributions of different type curves have direct relationship with geological structure. The vertical in-situ stress is greater than the closure stress in the Zhengzhuang block, but there is anomaly in the aggregation areas of the wavy and ascending fracturing curves, which is the main reason for the development of multi-directional propagated fractures. The fracture azimuth is consistent with the regional maximum principle in-situ stress direction (NE–NEE direction). Furthermore, the 265 fracturing curves indicate that the coalbed methane wells owned descending, and stable-type fracturing curves possibly have better fracturing effect considering the propagation pressure gradient (FP) and instantaneous shut-in pressure (PISI). Two fracturing-productivity patterns are summarized according to 61 continuous production wells with different fracturing type and their plane distribution, which indicates that the fracturing effect of different fracturing curve follows the pattern: descending type > stable type > wavy type > ascending type.

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Section: Materials and Methodologymentioning

confidence: 99%

Fracturing curve and its corresponding gas productivity of coalbed methane wells in the Zhengzhuang block, southern Qinshui Basin, North China

Chen

Liu

Cai

et al. 2020

Energy Exploration & Exploitation

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Monitoring shale gas resources in the Cooper Basin using magnetotellurics

et al. 2016

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The magnetotelluric (MT) method is introduced as a geophysical tool to monitor hydraulic fracturing of shale gas reservoirs and to help constrain how injected fluids propagate. The MT method measures the electrical resistivity of earth, which is altered by the injection of fracturing fluids. The degree to which these changes are measurable at the surface is determined by several factors, such as the conductivity and quantity of the fluid injected, the depth of the target interval, the existing pore fluid salinity, and a range of formation properties, such as porosity and permeability. From an MT monitoring survey of a shale gas hydraulic fracture in the Cooper Basin, South Australia, we have found temporal and spatial changes in MT responses above measurement error. Smooth inversions are used to compare the resistivity structure before and during hydraulic fracturing, with results showing increases in bulk conductivity of 20%–40% at a depth range coinciding with the horizontal fracture. Comparisons with microseismic data lead to the conclusion that these increases in bulk conductivity are caused by a combination of the injected fluid permeability and an increase in wider scale in situ fluid permeability.

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Science capabilities unlock Australia's oil and gas potential

Bradshaw

Bernecker

2016

The Leading Edge

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Australia is on the way to become the world's largest exporter of liquefied natural gas (LNG), with first shipments leaving the newly established export terminal on the east coast and four more development projects on the North West Shelf to be completed by 2017. Despite Australia being a key supplier of natural gas to the ever expanding energy markets in the Asia-Pacific region, the declining oil production is of concern. In this context, the Australian government actively supports the acquisition of precompetitive data that are used to enhance the understanding of hydrocarbon prospectivity in underexplored regions. Modern geophysical techniques, such as potential-field data interpretation, that allow the evaluation of basin configurations at regional scale are tools of ever increasing importance. Organic geochemistry has been applied to group the existing hydrocarbon accumulations according to oil families and tie those to the related source-rock intervals. Such work identifies oil and gas accumulations for which the source remains unknown, providing the impetus for further data acquisition. Many of Australia's sedimentary basins still are vastly underexplored, offering plenty of opportunities to make additional discoveries, as demonstrated by recent successes.

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Microseismic monitoring of hydraulic-fracturing programs in the Cooper Basin, Australia

Cited by 4 publications

References 1 publication

Fracturing curve and its corresponding gas productivity of coalbed methane wells in the Zhengzhuang block, southern Qinshui Basin, North China

Fracturing curve and its corresponding gas productivity of coalbed methane wells in the Zhengzhuang block, southern Qinshui Basin, North China

Monitoring shale gas resources in the Cooper Basin using magnetotellurics

Science capabilities unlock Australia's oil and gas potential

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