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High permeability, high permeability, fractured formation Development and application of plugging agent


Ignorant of the degree of cardiac No. Lemon 'Kw. PI, / Gt; / K'w /% IlIIlMPalMPa / mI Ⅲ r% 5fi3241O5350 (J2I42966I5776532 【655.51i0I273980558l060442759I70.0584990359I56.842340 【I.3ll03169954672001 Oil and Gas Field in Block 7 Volume 8 No. 4 Table 7 shows, Jn) concentration effect on the closure to a certain extent, JTD concentration more so, the higher G, the higher the blocking effect. The reason is that JTD higher the concentration, crosslinking density and intensity. 『Tincture closure due to the better, in general, JTD for field use concentration of 10% is more appropriate. 2.3JTD squeeze into the effect of volume on the block in the room,[link widoczny dla zalogowanych], the JTD 10% of the uniform preparation of glue, and fill four core permeability similar to sand control, in accordance with 2.1 method. JTD crowded glue different volume, the measured Pb, K, the results shown in Table 8. Table 8JTD squeeze into the effect of volume on the block can see from Table 8 , JTD crowded the larger the block the better, the higher the breakthrough pressure and the blocking effect, the reason is the amount of the more crowded too, blocking cross-linking agent The higher the intensity of curing, but limited to the cost factor to consider, Jn) crowded the amount of blocking agent should not be too large, the general closure for the near wellbore area of high permeability and big pore formation, is more suitable for use as sealing agent, it is proposed with other blocking agents such as bentonite, cement, lime, pulp and liquid waste such as used in conjunction, can achieve a better sealing effect 3JTD field application from September 1997 to December 1999, the blocking agent in the Zhongyuan Oilfield has two plants, three oil plants, oil Wuchang and Xinjiang oilfield, Tarim oil field to promote the application of oil well plugging 58 wells, construction of 100% success rate, the effective rate of 90% or more. Made great economic and social benefits of 85,063 cases of oil wells in Xinjiang, the well was 20 May 1992 production. Artificial bottom 3193.62m, oil central deep 3107.5Il1. Casing 139.7IllFfl, wall thickness of 7.72mm, the depth of 3202.45132, cementing not meet the quality control of geological reserves of 22.9 × 10t, 9.7% porosity, the effective thickness of 97.9m, perforation layer / Jr section / thickness / (3094 ~ 3121il1) / 11.5m, to May 1997, the cumulative oil 30333t, recovery degree 13.2%, L1 liquid production 44.4t, daily oil production 0.9t, water content 98%. May 12 1997 by JTD plugging of the well construction, blocking agent were used JTD 10t, water shutoff after construction, the well fluid production Ft 28.4t, daily oil production 7.8t, water content decreased to 72.5% a period of 192d, the cumulative increase of oil up to 1242t, precipitation of 4606ms, made very obvious effect of increasing oil precipitation. 4 Conclusion a) JTD with a good oil-soluble, acid soluble. 60% oil-soluble, acid soluble rate of 20%, acid soluble rate + rate of up to 80% or more, if mistakenly blocked oil, oil-soluble and can be accompanied by their acidification of appropriate measures to plugging. JTD blocking agent for most of the oil phase and dissolved in acid , which is conducive to selective water shut off oil production process to achieve the purpose b) JTD has good gelling properties, while the temperature on the gelation of a greater impact, but not a rubber at room temperature, is conducive to ground preparation. c ) JTD strata of different permeabilities good sealing effect, JTD higher permeability cores of the better blocking, breaking through the higher pressure gradient. Therefore, JTD favor blocking high permeability, high permeability,[link widoczny dla zalogowanych], fractured formation. And the larger K, Pb greater, the greater the block for high permeability, high permeability, fractured formation. d) JTD higher the concentration. Plugging the better, taking into account the cost of production and injection pump power limit,[link widoczny dla zalogowanych], the proposed maximum concentration of not more than 15%. e) JTD larger the crowded, Ph bigger, the better sealing, injection site should be as much as possible, climb high if the pump can be stopped in the compaction injection, and other underground pressure diffusion, the continued injection of: f) JTD has good erosion resistance performance, long period. References 1 Luo Yue, Jue-Long Wang, Zhang Xiaoping and so on. Oil layer protective agent JQD Multi Development and application of drilling fluid and completion fluid, 1999.16 (2) 2 Huang Junying mining Put Applied Chemistry Dongying : Petroleum University Press, 19873 Shito Yue Hui, Zhang Xiaoping,[link widoczny dla zalogowanych], Wang Zhengliang such as oil wells Department of sealing a bare organic and inorganic compound blocking agent station hundred sleeve Jianghan University. 1996,[link widoczny dla zalogowanych],18 (supplement) c edited Shao Xiaowei)
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