Kalajida structure is located in hollow zone of central Ferghana Valley,Uzbekistan.It is buried deeply with the characteristics of ultra-high temperature and pressure,containing H2S and saturated salt water of high pressure at the objective interval with salt bed covering it,which make oil production test extremely hard.The authors have successfully recorded and evaluated the test dada of Kalajida structure by carefully designing test plan,optimizing its parameters,using downhole testing tools of high pressure and temperature resistance and anti sulphur,testing wellhead assembly and control system,and studying and applying the technique of oil production test under ultra-high pressure.The result proves that the technique has reached advanced world standard and absolutely applies to oil production test of sulfur-containing wells(6000m deep) with ultra-high pressure(140MPa) and high temperature(1500C).

In order to obtain real downhole pressure and temperature curve during fracturing, and to evaluate the effects of fractured well, an electronic pressure gauge assembled with carrier of eccentric compression gauge has been selected for monitoring downhole pressure of Ge 13 well during fracturing and fluid discharge after fracturing. Through an analysis of monitored data, some parameters including formation fracture pressure, wellbore friction of fracturing fluid and net fracture-extension pressure have been obtained. Moreover, after reservoir reconstruction, some parameters including the shape, permeability, half-length of artificial fracture and formation skin factor are analyzed. That gives a reliable basis for evaluating the stability of formation stress and fracturing-fluid property. And it provides a certain reference for the secondary-pollution evaluation of fracturing fluid, effect evaluation after fracturing and optimization of fracturing design.

Add a test pub joint in drilling string,and install electronic pressure gauges in this test pub joint,then testing with the electronic pressure gauges while drilling can be conducted to obtain various kind of data such as down hole pressure and down hole temperature etc.,from which leakage sections appearing during drilling can be determined,density of mud in hole during underbalanced drilling can be calculated;and information about leakage and sealing,and for analyzing the efficiency of underbalanced drilling can be provided.

Fracturing in slim hole and casing deformation wells is different from the fracturing in general holes. It needs to be equipped with the downhole tools of minor diameters and wellhead devices resistant to high pressure,reauires a lot on the carrying capacity,anti-shear performance,and the performance of reducing friction. In order to solve the difficulties in fracturing in slim hole and casing deformation wells,according to the specialty of slim hole and casing deformation wells and the reality of minor diameter downhole tools,the Y341-70 packer and K341-98 packer are developed and the design of downhole technique string is accomplished for Ф89 mm and Ф127 mm casing slim hole wells and Ф139.7 mm casing deformation wells. The fracturing fluid and fracturing operation are optimized. The technology is successfully accomplished on more than 40 wells and achieves good effect.

Using the new model of introduced electric gauge, conducing test to the two wells, Ma6, 7 well of Santan lake, by comprehensive interpretation to reservoir and calculation to dynamic preservation, the aim of limited test is available. That solve the problem of limited test for unflowing well.

三塘湖盆地马7井是一口稠油井,在对该井进行测射联作过程中,二开期间稠油自溢流压曲线形成了一种特殊的波形曲线,与常见的压降曲线有着显著的区别,且流压与流温曲线形成了刚好相反的曲线特征,通过分析研究发现,这种特殊的流压流温曲线的形成与地面温度变化有关.因此,在开发生产过程中可以采用增温降粘的方式来提高厚油产量.

吐哈油田属低渗、特低渗型油田,压力系数普遍较低,地层易受污染,试油试气工作难度较大.在试气工作中结合各井地质特点,大力推广应用先进的射孔、测试、改造和气层评价等技术,逐步摸索出一套适合吐哈地质特点的科学试气配套工艺技术,在30层的试气实践中,取得了较好效果.