In this paper the author's investigation is carried out to find answers to the following questions: 1. How to design gas lift installation of a low capacity well. 2. Can we get more oil production when gas lift method is adopted to a flowing well 3. Effect of submergence on oil production of gas lift well. 4. Relation of pipe size to the period we can get oil production by applying gas lift method.
There are three factors, well condition, injection rate, and injection fluid, affecting the efficiency of fracturing of the treated oil reservoir. One of these, injection fluid is characterized by physical and chemical properties. Here, the author takes up the matters which are regarded very important for fracturing operation in the oil field. The discussion is made on some deviation of the laboratory study from field data in Yabase oil field.