The occurrence of gas confined in shales allows us to consider it as a component of the host rock. During drilling wells, the gas is released into the drilling fluid from finely ground gas-bearing rock particles. The amount of gas released can be determined on the basis of mud-gas logging; in addition, it is possible to determine the gas-content in shales expressed by the volume of gas released per mass unit of rock [m3/ton]. The gas content in the Ordovician and Silurian shales (Sasin formation and Jantar member respectively) in two selected wells in northern Poland was determined using this method. It has been found that clearly distinguishable, highly gas-bearing sections, which are separated by very poorly gas-bearing ones, can be determined in the well log. The increased gas content in shales can be observed in zones generally enriched in TOC. No direct correlation between TOC and gas-bearing capacity was found however, but the structure of TOC variability and the gas-bearing capacity described using variograms is identical. Correlations of the distinguished gas-bearing layers in the wells under consideration suggest a multi-lens or multi-layered reservoir model. The lack of natural boundaries in the shale gas reservoir means that they must be determined arbitrarily based on the assumed marginal gas-bearing capacity. In the case of several gas-bearing zones, numerous variants of interpretation are possible. In any case the low, best and high estimated resources may be evaluated, assigned to each borehole in the area with radii equal to the range of variogram of gas content in horizontal part of the well.
The Convention of the Law of the Sea of 1982 states clearly that countries bordering semi-enclosed seas, such as the Baltic, are expected to cooperate closely in securing their rights and executing their duties. The obligation to cooperate as stated in Article 123 of the convention refers to, among others, any installation or structure constructed on the Baltic Sea bottom. Russia and Germany both ignored this obligation as they viewed the proposed construction in strictly commercial terms. This position not only violates the norms of the both the Convention of the Law of the Sea of 1982 and HELCOM of 1992, but it also ignores the fundamental principles of the energy policy of the European Union. Article 23 statute 3 of legislation on the Republic of Poland's sea areas and marine administration, states that permission to construct and exploit any constructions within Polish sea areas (including those in the exclusive economic zone) is not to be granted if the proposed construction threatens the environment, marine resources, or the national economy. Unquestionably, the proposed Russian-German pipeline poses an ecological threat due to its length and is contrary to Polish interests.
The paper presents the mathematical model of a pipelay spread. In the model, elasto-plastic deflections of the pipe, its large deformations and contact problems are considered. The modification of the rigid finite element method (REFM) is used to discretise the pipe. The problem is analyzed in two stages. First, the quasi-static problem is considered. The tip of the pipe is pulled from the reel to the tensioner. Then, dynamic analysis (during ordinary work) of the pipelay spread is carried out. Some results of numerical calculations are presented.
Methodology of New Testament studies reflects the way(s) which are commonly accepted by scholars working with the second part of the Christian Bible in order to solve difficulties and problems connected with the proper reading, understanding and interpretation of biblical text. Taking into consideration the important document of Pontifical Biblical Commission Interpretation of the Bible in the Church (1993), the article describes the fundamental distinctions between approaches and methods as two general modes of enquiry of the Bible. The special attention is given towards the historical-critical method, stressing that her use is necessary in the scientific studies of the four Gospels as well as the other canonical books. Methodology of New Testament studies should also reflect the serious knowledge of the interpretation given by the Church Fathers and the Wirkungsgeschichte of the Bible.