The conditions of high temperature, high pressure and high sulfur content in deep well oil and gas exploitation put forward higher requirements for the sealing ability and service life of the downhole packer. K344 steel belt packer can improve the pressure bearing capacity of the expansion rubber cylinder and the stress condition in the process of pressure bearing and service life through the laminated steel belt between the inner and outer rubber cylinders, which is suitable for the requirements of deep well oil and gas exploitation. In this paper, the finite element software was used to simulate the setting process, the contact stress distribution law of the key components (inner rubber cylinder, outer rubber cylinder and laminated steel strip) and the mechanism of laminated steel strip to prevent the rubber cylinder from "shoulder protruding" were obtained. The optimal distance between the laminated steel strips at both ends and the optimal radius of the hoop fillet were selected through simulation analysis. It provided a reference for the optimization design of steel belt packer in practical production and application.

        In recent years, the natural gas hydrate as a new type of high efficiency, energy saving, environmental protection energy was praised by the world's energy industry, and its potential value could not be ignored. The study of gas hydrate was integrated in different countries of the world history, the present research situation and prospect analysis. In view of the natural gas hydrate in China started to be late and a series of actual situation, a set of research strategies suitable for the current development of our country was put forward, and some problems in the process of the actual mining were introduced.

Based on the typical oil sands of the 45° angle reservoir somewhere in Gansu province as the research object, an experimental model with the application of sodium hydroxide, sodium dodecyl benzene sulfonic acid and anionic polyacrylamide as the triple component ASP displacement agent was investigated using local oil sands as samples. The asp flooding on the secondary development of 45° angle oil sands reservoir effect after hotwater flooding was tested, and the changing laws of sweep area for displacement agent, flooding effect and production of different direction horizontal well were also studied. The results showed that, displacement agent flowed to transverse area and affected area increased significantly, making the oil sands recovery improved for 18.91%, and production of the horizontal well which parallel to inclination of the reservoir is higher.

In this work, the algae rich extract and probiotics ice cream is prepared using the soybean meal extract as the nutrients, and the fermentation liquor that containing the viable bifidobacterium as the additive. The optimal fermentation conditions and the optimal composition of the stabilizers and additives for algae juice are studied. The results indicate the optimal fermentation condition is with the mass fraction of fermentation algae juice is 60%, the mass fraction of bifidobacterium fermentation broth is 5%, fermentation temperature 37 ℃, fermentation time 12 h.The stabilizer of algae juice:the mass fraction of pectin is 0.15%,the mass fraction of propylene glycol alginate is 0.10%,the mass fraction of xanthan gum is 0.10%,the mass fraction of monasodium orthophosphate is 0.05%.The additives of algae juice:the mass fraction of fruit essence is 2%,the mass fraction of bee honey is 6%,the mass fraction of granulated sugar is 6%.This prepared product is a natural health food, which complies with the food healthy standard.

Volcanic-rock reservoir belongs to extremely low permeability gas reservoir. However, as with natural holes and rifts, it can be for industrial development. Relative permeability curve is an important data for dynamic analysis and numerical simulate of gas reservoir development. It illustrated by the case of a Jilin Province's volcanic-rock gas reservoir, and measured the relative permeability curve by unsteady-state water displacement by gas. The results show: It had a high bound water saturation, residual gas saturation and water saturation in isotonic point; it also had a low relative permeability in isotonic point and a low water relative permeability in endpoint; confining pressure and displacement pressure had a significant impact to the results; volcanic-rock reservoir had a serious heterogeneity.