Optimal Fracturing Parameters Condition of Integrated Model Development for Tight Oil Sands Reservoir with 2D Fracture Geometry Using Response Surface Methodology

Truong, Nguyen Huu; Bae, Wisup

doi:10.19026/rjaset.12.2818

Cited by 1 publication

(1 citation statement)

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“…Owing to the reservoir heterogeneity, the recovery of trapped oil inside micropores is difficult, resulting in low waterflooding efficiency. Therefore, for tight reservoirs with highly heterogeneous formations, differential development regimes are desired in order to improve oil recovery efficiency [14]. A great amount of work has been done in the past regarding this particular issue.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Classification of Tight Sandstone Reservoirs via Imbibition Characteristics

Yang²,

Lü³

et al. 2018

Energies

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Tight sandstone reservoirs are often produced by shutting in the well and inducing imbibition. However, by adopting current reservoir classifications, the heterogeneity of reservoirs cannot be properly treated. Based upon the analysis of the imbibition curves and mercury intrusion porosimetry tests, Chang-7 tight sandstone reservoirs were classified into three categories according to the newly proposed standards. Imbibition tests demonstrated that for the first category, imbibition and drainage occurred continuously and never reached the plateau within the experiment duration. It was suggested that a longer shut-in time favors the production of oil. For the second category, a steady state for imbibition was reached and a shut-in time as short as three days resulted in a high imbibition rate. For the third category, a plateau was reached for the first time and imbibition restarted until a steady state was reached. The average shut-in time for the third category was eight days. Compatibility between reservoir characteristics and a soaking development regime based upon the proposed classification methods effectively enhances the oil recovery efficiency of formations with distinct petrophysical properties. This provides insight into the classification methods of tight sandstone reservoirs.

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Section: Introductionmentioning

confidence: 99%