The paper mentions that understanding why and how fractures came about enables one to better predict and model their effect on fluid flow. Genetically, fractures can result from: (1) tectonic (fold- and fault-related), (2) regional joint or cleat system, (3) contractional (chicken wire, digenesis-related or columnar), and (4) surface-related or...
The paper points out that the detection of the subsurface characteristics and distribution of fractures is critical to petroleum reservoir profitability. Cost-effective data can be gathered that enables predictive models to maximize production from fractured reservoirs. It also adds that the natural fractures have influenced reservoir performance in the fine-grained...
The paper mentions that improvements in horizontal drilling of fractured oil shale plays can have a steep learning curve. Attaining a cost-effective level of success can be related to efficiency of drilling, proper orientation of the horizontal leg to intersect the maximum number of fractures, avoiding formation damage, using appropriate...
Readers get a change of pace this month, as this Petroleum Technology Digest PTD is more like a column than a case study. As the Petroleum Technology Transfer Council's (PTTC's) national project manager, I frequently listen to discussions within our regional advisory groups. A recent conversation on...
Below 10,000 ft, a horizontal well was drilled onshore southern California using novel Managed Pressure Drilling MPD technology to horizontally access over 2,200 ft of fractured, light-oil Monterey Shale with a concentric-string, air-injection system and a simple water-based, drill-in fluid. The MPD method and drill-in fluid design...
Deep gas stimulation. Deep gas represents a significant gas supply, with US resource estimates ranging from 87 to 133 Tcf. For the next few years, some 600 deep gas wells per year will be drilled in the US, representing only 1% to 2% of wells, but their...
Covering a range of technologies from reservoir geophysics, hydraulic stimulation evaluation, downhole waste disposal and offshore rig equipment handling, four proven technical advances are introduced and summarized here. The innovations described include: 1) examples of deepwell injection to dispose of oilfield wastes; 2) how passive...
A technology that allows proppant to be placed into a created fracture without using potentially damaging liquids has been developed, tested extensively in Canada, and now made available for U.S. applications. Called Dry Frac, the technique uses liquid C[O.sub.2] as the carrier fluid without water or any additional treatment additives...
Articles 1998-01-01
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