Engineering Process

Study on benefit extraction technology of super deep super heavy fractured-vuggy reservoir in Tahe Oilfield

  • Fen SUI
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  • No. 2 Oil Production Plant, Sinopec Northwest Oilfield Company, Luntai, Xinjiang 841604, China

Received date: 2019-10-09

  Online published: 2020-04-28

Abstract

The super heavy oil of Tahe Oilfield has high geological reserves, deep burial, and fluidity in the reservoir. During lifting, as the temperature decreases, the viscosity increases and the flow capacity decreases, leading to the impossible production. Therefore, recovery mainly adopts dilute oil to reduce adhesion. With the continuous drop in oil prices, the influence by the sales price difference between the added dilute oil and the produced heavy oil, and the energy consumption caused by the repeated work of dilute oil, lead to the decrease of the benefit. In order to improve the production efficiency of super heavy oil reservoir, the technology exploration, technical tackling and pilot test are carried out from three aspects of stratum, wellbore and surface. The application of mineral-insulated copper-clad cable heating and nano thermal insulation tubing has achieved remarkable results, saving 98 600 tons of dilute oil. It can be popularized in such super heavy oil reservoirs. The breakthrough of temperature-resistant and salt-resistant water-soluble viscosity reducer and the progress of the sulfur-resistant screw pump lift technology provide sufficient conditions for the efficiency recovery of super heavy oil reservoirs. The principle of efficient ground gathering and transportation is simple, but involves the network transformation and equipment upgrade, with high cost and complex implementation. Now the test equipments are in preparation. As the technology of formation viscosity reduction is very difficult, it is in the stage of technical demonstration. The development and integrated application of low-cost recovery technology for super heavy oil improve the development benefit. And after general consideration, the bottleneck is found out according to the specific well conditions, and the matching technology in the technical system is select, so as to achieve the goal of efficiency recovery for super heavy oil, and improve the ability of oilfields to cope with low oil prices.

Cite this article

Fen SUI . Study on benefit extraction technology of super deep super heavy fractured-vuggy reservoir in Tahe Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2020 , 10(2) : 94 -100 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.02.016

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