The shale gas reservoirs in Pengshui Block belong to the normal pressure system, where the spontaneous production fails after hydraulic fracturing. This is due to the relative low energy and productivity of the reservoirs, hence it is necessary to deploy the artificial lift for the production wells to drainage the water throughout the whole production stage. As the drainage methods are hardly suitable for the various flowback volume in different mining stages, the water drainage efficiency is low. In order to determine the efficient drainage strategies for Pengshui Block, several drainage processes, including electric potential pump+gas lift, concentric tube（small diameter tube） drainage, self-sufficient gas lift and transmission gas lift, are comprehensively evaluated and optimized at the point of economic and technical stage according to the drainage characteristics of the block. The drainage efficiency of gas lift forms a set of drainage technology suitable for shale gas with normal pressure in Pengshui Block. The flowback efficiency of gas lift is up to 72 % in field application. It provides a significant guideline for improving the development of shale gas reservoir in Pengshui.

Deliquification is an important means for controlling the flooding of gas wells and maintaining the even advancement of the edge and bottom waterline in high-sulfur gas fields. First, according to the characteristics of the completion structure of the Puguang and Yuanba deep high-sulfur gas fields, the adaptability of the existing deliquification technology is analyzed. The suitable deliquification technology is selected. Then, the high temperature resistant ternary composite foaming agent is developed. A high-sulfur gas well bubble agent wellhead safe filling process is established. A solid foaming agent anti-sulfur delivery device is developed. The coiled tubing + nitrogen step-by-step gas lift process is proposed. The gas injection method, gas injection volume, gas injection pressure is optimized.The field applications of bubble deliquification and gas lift technology in high-sulfur gas wells are carried out. The results show that the new foaming agent has good foaming and foam stabilization performance in simulated formation water aged at a salinity of 10×104 mg/L, pH of 3～8, and high temperature of 180 ℃. The foam deliquification process has successfully achieved short-term stimulation of 2 wells with accumulated liquid. The effective period of single operation stimulation is 3～5 d. The coiled tubing + nitrogen step-by-step gas lift technology controls the lifting pressure of deep high-sulfur gas wells within 35 MPa, with the maximum gas injection depth reaches 6 150 m. 6 water-flooded wells are successfully resumed to produce with the effective period of stable production per single operation of 1 to 2 months. The tubing filling bubble deliquification technology and coiled tubing nitrogen lift technology are temporary measures to eliminate liquid accumulation at one time, and do not meet the long-term deliquification requirements of high-sulfur gas wells, and it is necessary to explore more long-term new deliquification technology.

Accurate judgement of the wellbore flow pattern of water producing horizontal gas wells is the key to predict the wellbore production dynamics and reasonable selection of artificial lift measures. Based on the gas well production data of Pengshui block, a set of visual air-water two-phase flow simulation experimental device with variable deviation angle is designed. And the similarity criterion is used to carry out 150 groups of two-phase flow simulation experiments, including five pipe bevel angles, six gas velocities and five liquid velocities. Finally, four flow types are summarized and the influences of angle, gas velocity and liquid velocity on the convection type are analyzed. Gas velocity has a great influence on flow pattern in vertical and inclined pipe sections. With the decrease of gas velocity, flow pattern shows in turn as annular flow, agitating flow and slug flow. However, the liquid velocity has little effect on the flow pattern of each section. By comparing the experimental flow pattern with the typical flow pattern chart of the reference articals, the two-phase flow pattern chart suitable for the Pengshui block is optimized, that is, AZIZ flow pattern chart of vertical pipe + GOULD flow pattern chart of inclined pipe + GOIVER flow pattern chart of horizontal pipe. The research results can effectively predict wellbore flow pattern changes and provide technical support for the adoption of subsequent artificial lifting process.

Zhongyuan oilfield bridge exit wellblock has the characteristics of big density for reservoir and poor physical besides,most of the g as well have low output and short test time. This paper takes analysis of the current situation of gas recovery technology in this block and puts forwar d taking use of gas well node analysis technology to establish model, besides, takes sensitivity analysis of tubing diameter and wellbore pressure profil e combined with the fluid-carrying ability and erosion-wear ability to comprehensive choose better tubing size suiting for this block.

由于文96气藏与文92南、文13东油藏北部在平面上重叠，部分油藏油水井穿过该气藏。储气库投入运行后给地层造成很大的伸缩压力。在储气库强注强采的影响下，势必会对下部层系的生产井产生影响。为保证气库长期有效、安全运行，储气库建设方案对老井提出了封井原则。通过研究，搞清要封堵井潜力状况，结合构造储层精细解释，对S3上和S3中断层特征研究的基础上理清构造格局，通过精细地层对比追踪弄清储层展布规律，再按照潜力大小，对封堵井实施补孔、封堵、转采等挖潜措施，提高储量动用程度，增加单井产能，减缓封堵井对区块开发影响。

Dongying Formation reservoir in the text field belonging to the secondary reservoir, the current text in the text field 10, Man 15, Man 276 block of multi-well logging and other display better, and some wells measuring result is displayed as the reservoir for many years in succession on the the reservoir for the test oil production test pilot. Some saw the commercial oil wells. However, due to the accumulation in Dongying Formation reservoir understanding of the law is unclear, no systematic research and development. The need for distribution rule Dongying Formation reservoir, reservoir size and potential depth study.