Abstract: Aiming at the horizontal well development in superlow abundance and superthin pay zones，the main factors and sensitivity impacting the deliverability，as well as the flow through porous media，exploitating characteristics and adjustment method，are studied.Putaohua reservoir，Daqing Oilfield is taken as an example，it is pointed out that the exclusive characteristics of the reservoir are the thing pay zones and poor liquidsupplying and absorbing capacity on unit area.Research indicates that in order to ensure enough crude production and development efficiency，the controlling area of horizontal well must be fully enlarged，the effective horizontal section lengh in unit area reservoir(i.e.，the penetrated pay zone rate) is kept shorter，which will be accordance with the liquidsupplying capacity，and the liquid production of reservoirs will meet requirement.The key of the well spacing in the reservoirs is to precisly controll the location of penetrated target on plain.The oil and water flooding frontier and residual oil area of well paten for laddered horizontal wells are all insymetrical and uneven，which will impact the development effectiveness，however，by using uneven layered water injection or branched horizontal wells substituting laddered horizontal wells，the development effectiveness can be greatly improved.

Key words: superlow abunance, horizontal well, impacting factor, development adjustment